LUNT LS100MT/B3400R&P Multipurpose APO Telescope for Sun + Night-Sky

Product Highlights

Modular 100 mm ED Apo telescope for observing & photographing prominences & more at the sun during the day and moon, planets & deep-sky at night

  • Special telescope for observing the Sun in H-alpha
  • Also for night sky observation, modular design
  • 3-lens ED refractor FPL-53, 100 mm aperture, 714 mm focal length
  • Observation & photography with excellent image quality
  • Bandwidth less than 0.7 Angstrom
  • Very large B3400 blocking filter installed inside focuser
  • Solid R&P focuser with 10:1 reduction
  • Also for Ca-K & White-Light solar observing
  • Absolutely safe, no danger to the eyes

£12,790.00*

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Product number: 0551424
GTIN/EAN: 4007922084305

With BRESSER, you can enjoy a smooth introduction to the vast world of astronomy. Our detailed information ("Telescope Guide") provides valuable tips for beginners—but even experienced astronomers can use the information we provide (e.g., tables for the geographical latitude of all major world cities) as a reference.

Here is the table of contents of the comprehensive BRESSER Telescope Guide:

Sky Guides von Bresser

Der Sky Guide bietet umfassende Informationen zu Sternbildern, Planetenpositionen und astronomischen Ereignissen – ideal, um Ihre Beobachtungen zu planen und noch tiefer in die Astronomie einzutauchen. 
Besuchen Sie den Guide direkt hier, um das Beste aus Ihren Beobachtungen herauszuholen!
Product information "LUNT LS100MT/B3400R&P Multipurpose APO Telescope for Sun + Night-Sky"
Modular designed multipurpose telescope, both for observing the sun in the H-alpha wavelength, as well as for night sky observations. Easy conversion between the different applications with a few simple steps. 3-lens apochromatic telescope with FPL-53 glass, 100 mm aperture and 714 mm focal length - excellent image quality for H-Alpha solar observation and also for observing the starry sky at night.

With innovative air pressure tuning system, good 2 inch (50.8 mm) R&P focuser, and B3400 blocking filter.

Solar observation in H-alpha:
The LS100MT/B3400 is a complete telescope for observing the sun in H-alpha light, with 100 mm free aperture (no central obstruction) and 714 mm focal length. The H-alpha wavelength is the most impressive way to observe the sun, showing protuberances at the sun's edge, filaments and flares on the surface, and much more. An internal Etalon filter achieves a bandwidth of <0.7 Angstrom with the innovative air pressure tuning system Pressure-Tuner. Tuning is done by slightly changing the air pressure in a pressure chamber inside the telescope. This changes the refractive index of the air, making it easy to tune to the H-alpha line. The pressure tuner guarantees a homogeneous image, without central obstruction, and a permanently protected Etalon without erosion. A set of collimating lenses installed in the telescope ensures best performance.
Fine adjustment is achieved with a solid 2 inch R&P focuser with 10:1 reduction.
Blocking filter is the B3400. The B3400 is good for solar imaging by cameras with very large sensor chips and can also be used for visual solar observing.
The B3400 blocking filter is permanently installed inside the 2 inch R&P focuser. Common 2 inch star diagonals or other 2 inch accessories can be used.

Observing the starry night sky:
The H-Alpha Etalon system can be removed from the telescope in a few easy steps thanks to its modular design. With the additionally available conversion kit (item number 0551430) the 3-lens apochromatic refractor can then be used as a normal telescope with 100 mm aperture and 714 mm focal length for observation and photography of the night sky. The FPL-53 triplet lens offers an outstandingly low colour aberration image. Common 2 inch star diagonals can be used at the high quality R&P focuser of the conversion kit 0551430.
Please note that the optionally available conversion kit 0551430 is absolutely necessary if the telescope should be used at night.

More applications:
With additionally available accessories the LS100MT offers even more possibilities!
- Double-Stack
The LS100MT telescope can optionally be upgraded with the additionally available double-stack module DSII/SFPT (item number 0551395). The DSII system is an internal double-stack module. Thereby a bandwidth of <0.5 Angstrom is achieved for H-alpha solar observation. Thus much more details on the solar surface will become visible.
- Solar observing in White-Light
If the H-alpha unit has been removed, of course either a sun filter to be installed in front of the objective, or a Herschel-wedge at the focuser can be used to observe the sunspots in White-Light.
- Solar observing in Ca-K wavelength
Certainly, the Ca-K filter modules from LUNT Solar Systems can also be used at the LS100MT to observe and photograph super-granulation and other effects visible in this wavelength on the sun.

This makes the LS100MT a completely universal usable apochromatic telescope of the highest quality!


FEATURES

  • 3-lens APO refractor, FPL-53
  • Aperture: 100 mm (no central obstruction)
  • Focal length: 714 mm
  • Bandwidth: internal Etalon with <0.7 Angstrom
  • Tuning: air pressure tuning system Pressure-Tuner
  • Blocking filter: B3400 with 2 inch connection
  • Focuser: R&P with 10:1 reduction
  • Two tube-ring with handle
  • Sol-Searcher installed inside handle
  • Dovetail bar at GP-level for astronomical mounts
  • Weight: 6.8 kg
  • Length with dew-shield: 78 cm
  • Length with removed dew-shield: 65 cm


SCOPE OF DELIVERY

  • LS100MT Multipurpose Telescope
  • Pressure-Tuner
  • B3400 blocking filter installed inside focuser
  • 2 inch R&P focuser with 10:1 reduction
  • Tube rings with dovetail bar
  • Transport case (78 x 33 x 23 cm)
  • Instruction manual
Conversion kit for observation of the starry night sky (0551430) not included!


Colour: white
Focusing system: 2" Rack-and-Pinion Focuser with 10:1 reduction
Material: Aluminium
Mount Type [Telescopes]: Optics without Mount
Optical design: Apochomatic Refractor
Telescope filter type: Solar Filter H-Alpha

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Accessories

LUNT LS100MTBP&F Conversion Kit for LS100MT
​The LS100MT solar telescopes can be upgraded with this optional conversion kit. This allows the telescopes to be used as 3-lens ED apochromatic refractor for observation and photography of the starry night sky.The H-Alpha system of the LS100MT telescopes can be easily replaced by this conversion kit. The conversion kit offers a very high quality and solid R&P focuser. Even the heaviest cameras or other accessories will be hold without any problems and can be focused sensitively by the integrated 10:1 reduction.Simply loosen three knurled screws holding the H-Alpha unit including the focuser at the LS100MT. Attach here the new focuser, and your LS100MT is transformed into a full 3-lens apochromatic telescope. The new focuser offers 95mm focusing way with backlash- and tilt-free mechanics also when using heavy accessories. A 2 inch ring-clamp is directly at the focuser, and an adapter to 1.25 inch also with ring-clamp is included in delivery.But this is not all: With this conversion kit Herschel-wedges or Ca-K modules can be used at the LS100MT telescopes for solar observation. This makes it possible to observe the sun in H-alpha, in Calcium-K wavelength light, or in White-Light - with one and the same telescope!This conversion kit turns the LS100MT into a real all-round telescope!FEATURESBacklash- and tilt-free mechanics95mm focusing way10:1 reduction2 inch and 1.25 inch ring clampingSCOPE OF DELIVERYHigh quality 2 inch focuser with adapter to LS100MT telescopesAdapter from 2 inch to 1.25 inchInstruction manualLS100MT telescope not included! Can only be used together with a LS100MT solar telescope. This conversion kit is absolutely necessary if a LS100MT telescope should be used for night sky observation.

£379.00*
LUNT DSII/SFPT double-stack module for LS80MT & LS100MT
Double-stack module for more contrast and details on the solar surface with the LS80MT and LS100MT telescopes.At the LS80MT and LS100MT telescopes double-stacking is possible with this internal DSII double-stack module when observing the sun in H-Alpha. The DSII modules reduce the bandwidth to <0.5 Angstrom. They are designed to show the surface details of the sun better, the contrast is significantly increased and therefore filaments and active regions are better visible.The DSII/SFPT module is designed exclusively for use in LS80MT and LS100MT telescopes, it cannot be used at other telescopes. It is used between the existing H-Alpha unit and the focuser on the telescope. Installation is simple, no additional adapters or tools are required.FEATURESBandwidth: <0.5 AngstromTuning: Air Pressure Tuning System SCOPE OF DELIVERYDSII module with internal Etalon for LS80MT and LS100MT telescopesPressure Tuner System(LS80MT or LS100MT telescope not included!)

£3,698.00*
BRESSER Diagonal Mirror 2" with 93% reflection
A very good diagonal mirror for telescopes with 2" focuser and for the BRESSER Messier telescopes with a 2.5"- HEX focuser. Enables the use of eyepieces and accessories with 2" barrel, so that a wider field of view can be reached. A larger light beam and a comfortable observation position is achieved by this 2 inch zenith mirror. Especially for use with refractors and for zenith observations a useful accessory.  The clamping ring is made of brass, so there will be no scratch marks on your high-quality eyepiece. The precise clamping is another advantage. The BRESSER 2" Diagonal Mirror is completely made of metal and has a very accurate flat mirror. The dielectrical coating delivers a 93% reflectance and is very durable against enviromental influences. FEATURES Star diagonal mirror for focuser with 2" barrel High quailty flat mirror Dielectrical mirror coating delivers a 93% reflectance Very durable against enviromental influencesEyepiece adapter 1.25/2.0 inch includedBrass eyepiece clamping ring Housing completely made of metal Dust caps included SCOPE OF DELIVERY diagonal mirroreyepice adapter 1.25/2.0 inch dust caps

£79.00*
LUNT LS7-21ZE Zoom Eyepiece 7.2mm - 21.5mm
Lunt Solar Systems zoom-eyepiece with variable focal length from 7.2mm to 21.5mm, with 1.25 inch (31.7mm) connection.The special of this zoom eyepiece is that the optical layout offers highest quality views of the sun, but also on nightsky objects. LUNT minimized the reflections by using superb multicoatings and with care designed internal baffle system and blackened lens edges. The LUNT zoom-eyepiece is not the widest field zoom-eyepiece on the market, LUNT prefered best performance over widest field. The sun and stars are perfect pin point across the entire field of view without any visible distortion. The LUNT zoom-eyepiece is almost parfocal, from one end to the other end of the zooming way you need only 0.5mm to refocuse. The LUNT zoom-eyepiece has a very nice height adjustable eyeguard to protect your eye against day light reflections and to help you to find the perfect eye position.Please note that these eyepieces are only accessories for existing solar telescopes or filters when observing the sun. Solar observation alone with these eyepieces without additional solar filters is not possible!FEATURESFocal length: 7.2mm - 21.5mm continuously adjustableBarrel size: 1.25 inch (31,7mm)Diameter: 47mmHeight: 82mmWeight: 170gEye relief: 15mmLenses / Groups: 7 lenses / 4 GroupsField of view: 53° at 7.2mm - 40° at 21.5mmSCOPE OF DELIVERYLUNT Zoom Eyepiece 7.2mm - 21.5mm

£349.00*
LUNT PCUSB Pressure-Tuner Controller with USB
Electronic Control unit with USB connection for one LUNT Pressure-Tuner system.The PC-USB is a microprocessor controlled pressure control system that can be retrofitted to any LUNT instrument (except LS50THa) with Pressure-Tuner (PT), without return to the Lunt facility. A simple air-pipe connects the PC-USB to the Pressure-Tuner. All existing PT systems (except LS50THa) can be retrofitted via an included adapter to the pressure tuner knob. The PC-USB can be used at any altitude.The PC-USB controller can be manually operated directly by the control panel at the housing, or via a computer by USB connection (Windows 7 or higher needed). A USB cable with USB-B plug is necessary for operating by a computer, this USB cable is not included. You will find the software for download on this webpage above at the tab "Manuals".Upon power up the PC-USB will go thru a systems vent and ambient pressure set mode. This will take around 60 seconds. The PC-USB is a simple 2 button system. One button for increasing and one button for decreasing the PT pressure. Digital feedback and indicator lights are provided. The PC-USB is accurate to 0.027 Bar (0.4 PSI), providing very precise control of the pressure setpoint. The PC-USB will auto-compensate for fluctuations in internal pressure changes due to significant changes in temperature. The PC-USB can be user programmed to center wavelength set point. Due to the sealed nature of the system, the center wavelength set point will remain constant at any altitude at a given set pressure point. Because the PC-USB can provide closed-loop feedback of internal etalon pressure users can correlate change in pressure to doppler shifted events.Normally the telescope shakes while you are tuning mechanically. Especially if you use high magnification, for example for observing the Doppler effect at a filament. With the PC-USB system there will be absolutely no shaking of the telescope while tuning at all magnifications, so observing Doppler shifted events will become more comfortable.The PC-USB can run continuously on internal battery power for more than 8 hours. It has external power input (15V DC) that can power the unit and charge the internal batteries simultaneously.SCOPE OF DELIVERYLUNT PC-USB Control SystemAdapter for PT knob3m air-pipeAC-adapter (with Euro-plug)Please note that this controller is not compatible with LS50THa series telescopes!

£1,398.00*
LUNT HAT solar hat with neck flap
Keep your head covered and prevent sunburn while observing. UV protectant material with small pocket and clip to prevent being blown off in the wind. Cool ventilated design. Neck flap to keep your neck protected while looking through the eyepiece.SCOPE OF DELIVERYSolar Hat with neck flap

£59.00*
BRESSER Messier EXOS-2 EQ GoTo Mount
BRESSER EXOS-2 GoTo Equatorial Mount. Mount, tripod and hand box with computer. This German mount has tracking motors in both axes that follow celestial objects very precisely.The handbox with GoTo works reliable and controls the mount in every situation. Precise ball bearings in both axes ensures minimal backlash at all nine possible tracking speeds.The battery pack (12 V) is conveniently fastened to the tripod shelf and takes eight size "D" batteries.The mount rests on a very tough and rigid stainless steel tripod and can take optical tubes of up to 13 kg. GOTO - Stargazing at the push of a button! The Startracker GoTo System enables beginners to start astronomical observations in just a few minutes, and guides you to objects that are hard to localize through a standard finder scope.Just push the button and the GoTo System will find planets, nebulae or galaxies for you and position your telescope automatically and precise.The GoTo System database includes thousands of astronomical objects.The Messier mount with GoTo System allows you to observe without tedious searching, or image faint objects that are hard to find in a standard finder scope.The BRESSER StarTracker GoTo systems uses servo motors for both axes and features an ST-4 compatible autoguiding input. Guiding aggressivity can be set on the mount itself. The menu navigation of the Startracker Handbox is also multilingual and offers the settings of German, English, French, Spanish and Italian.CHARACTERISTICS MOUNT Stable parallactic mount with fine drive in both axes Ball bearings in both axes for more precise movements Stable height adjustable stainless steel tripod ( Min. 69cm / Max. 109,5cm ) Load capacity up to 13 kg payload Circular bubble for easy horizontal alignment GoTo Mount with motors and hand box controller, for easy finding and guiding moon, planets, stars and much more ST-4 compatible autoguider interface Pole height scale for setting the latitude Scaled graduated circular rings to facilitate finding objects using a star atlas or planetarium software Pole finder scope with optional illumination ( item no. 4964212 ) Tripod weight: 4.7 kg Mount weight: 6.7 kg (without counterweight) Total weight incl. counterweight: 15.9 kg Batteries: not included SCOPE OF DELIVERY Equatorial EXOS 2 GOTO mount with stainless steel tripod and Startracker handcontroller Adjustable polar finder scope with optional illumination Stainless steel tube field tripod with accessory tray 1 x 4.5 kg counterweight

£841.00*
BRESSER Twilight I telescope mount with tripod
The Twilight I is a light-to-medium-duty alt-azimuth mount with tripod designed to quickly and easily accept small to medium sized refractors, such as the AR102 + AR127s or ED102mm + ED127, and of course, the ED80mm. Lightweight, fast Newtonians will also match up nicely with the BRESSER Twilight I mount. As long as your telescope does not exceed 18 pounds and has a Vixen-Style Universal Dovetail bar for mounting the telescope to the mount head, you are good to go. The Twilight I alt-azimuth mount head is made of powder-coated aluminum and there are worm gears on both axes. The adjustable angle head can be tilted forward or back at a 45° angle to allow more clearance for your telescope so you can point it straight up for viewing at the zenith. The Allen hex wrench for doing the mount head adjustment can be safely stored at the integrated magnetic holder.  Slow-motion control cables are attached on the vertical and horizontal axes, and are easy to turn during the night, even with gloves on, due to the over-sized knurled knobs that are attached to the end of each cable. They can be attached to either side of each axis to accommodate right or left-handed users, or different types of telescopes (e.g. refractors vs. Newtonian reflectors) for ease of adjustment. The stainless steel tripod that comes standard with the Twilight I mount has adjustable legs and a wide foot print of 42 inches, which makes the tripod more stable. A spreader bar locks against the inside of the legs to secure the tripod even further, and keep vibrations to a minimum. SCOPE OF DELIVERYTwilight I Telescope MountStainless Steel Field tripod

£280.00*
Vixen SXD2WL Equatorial GoTo Mount with Wifi
Vixen has developed a new generation of SX mounts for demanding observers and astrophotographers. The SXD2WL mount is simply operated via a Wifi module with a smartphone or tablet. By controlling the mount with your smartphone using the free STAR BOOK Wireless app, you can easily use sky navigation functions such as automatic GoTo panning of celestial objects via your smartphone or tablet. By eliminating the power consumption of the conventional LCD (STAR BOOK TEN), the power consumption on the mount is reduced by up to 20%, thus enabling longer astronomical observation and astrophotography. When the desired celestial object is selected from a list, it is automatically panned into the telescope's field of view and tracking begins. An existing STAR BOOK TEN controller can also be used on this mount without any problems. Equipped with the same precision stepper motors as the top model, the AXD mount, the SXD2WL brings a new standard of performance and precision to the Vixen mount family. With a photographic load capacity of 15 kg, the axis cross of the mount weighs just 9.2 kg making it ideal for mobile observations. In addition, the motors mounted in the lower part of the mount also serve as a counterweight, so the mount requires fewer weights for balancing. The SXD2 mount in detail Precision stepper motors and micro-step motion control system At the heart of the SXD2 are the precision stepper motors, which offer better performance and response than previous models. The micro-step motion control system offers powerful and yet very smooth drive characteristics, which are given both in fine movements and in fast pans. Built-in bearings The bearings of the RA and DEC axes and the worm shafts have been significantly improved to reduce the load on the motors. As a result, the motors move much more smoothly than in previous models. High-precision worm gears High-precision processing technologies eliminate worm gear errors. The edges of the two worms and worm wheels are particularly smooth, enabling very precise tracking. Declination axis as counterweight The solid motor units are installed in the lower part of the declination axis so that the center of gravity of the SXD2 is below the intersection point of the RA and DEC axes. This means you need fewer additional counterweights. Latitude setting The latitude is adjustable between 0 and 70 degrees (divided into 3 zones and adjustable +/- 15 degrees per zone, for high, medium and low latitudes); latitude scale in 2-degree increments; fine adjustment with a tangent screw head, approx. 0.8 degrees per turn. Built-in PFL-II polar finder with illumination The built-in 5x20mm polar finder with 10° field of view has a 3-star alignment system. This eliminates the inconvenience of setting the date and original time. The illuminated reticle with variable brightness and automatic switch-off is adjustable in 8 levels and illuminated in red. The adjustment accuracy is 3 arc minutes. The wireless module in detail The Vixen Wifi adapter for EQ mounts allows you to control your Vixen mount via a smartphone or tablet. With the smartphone app STAR BOOK Wireless (free of charge) you can navigate the sky without any cables. The app turns your smartphone or tablet into a control unit for the equatorial mount in no time at all. The response delay of the mount, which is considered the biggest disadvantage of wireless connections, has been reduced to a level comparable to wired connections. Reduced power consumption compared to conventional controllers with LCD monitor The power consumption of the mount is reduced by up to 20%, allowing longer observations than with conventional wired controllers such as the STAR BOOK TEN. Operation similar to the STAR BOOK TEN controller. The STAR BOOK Wireless app has a similar structure to the STAR BOOK TEN controller. Depending on the star map setting, it contains up to 259,000 celestial objects. Tap on a celestial object in the object list and start the GoTo. The mount will now automatically move to this target and bring it into the telescope's field of view. All the popular features of the STAR BOOK TEN are retained Convenient operation When looking through the telescope operate the mount by swiping on the app's star chart. As there are no buttons, simply slide your finger over the star chart to operate the mount conveniently. Extensive astronomical data included In addition to data on easily observable celestial bodies such as Messier objects, NGC objects and IC objects, this also includes the sun, moon, planets, comets and dwarf planets. High-precision alignment By aligning the mount to one or two stars, you can already achieve fairly precise positioning. By aligning the mount to three or more stars, you can achieve high-precision alignment of the mount for high magnifications. The objects are then approached precisely and centrally in your telescope's field of view. The alignment information is saved and can be retained even when the device is switched off. By leaving the telescope in its current state after completing an observation without moving it, you can start the automatic installation with the same settings for the next observation.  Individual setting options As with the STAR BOOK TEN control unit, the app offers various individual settings, such as gear backlash compensation, night mode in red, autoguider and variable GoTo speed and LED brightness. You can also set the timing of the reversal of the objective tube (meridian flip) as desired. Even if the object moves to the south during tracking, you can prevent the telescope tube from reversing. Important note: Cannot be used on old SX mounts with the old blue Star Book! Technical information about the Wifi module: CPU with 32-bit CISC processor 120 MHz The unit is connected to the mount via a D-SUB 9PIN connector as with the STAR BOOK TEN. It has a 6-pin 6-wire modular plug for external autoguider operation. Supported operating systems are Android 6 or higher, iOS 9.0 or higher, WLAN standard: IEEE 802.11b/g/n. FEATURESRA sprocket: 180 teeth DEC sprocket: 180 teeth Shaft material and diameter: Carbon steel / Decl. 35 mm, RA 40 mm thickness Polar finder scope: 6x20 mm, PFL-II polar finder Fine height adjustment: 0° to 70°, (fine adjustment +/- 15°, height) Backsight rod: 20 mm diameter Azimuth adjustment: worm fine adjustment Power supply: DC12 V; 0.4~1.7 A Maximum load: 15 kg, photographic, without counterweight Counterweight: 1x 1.9 kg and 1x 3.7 kg Tripod connection: 45 mm spigot Dimensions: 36 cm (H) x 12 cm (W) x 36 cm (L) Weight: 8.8 kg (19.4 lb), without counterweight 32-bit CISC processor 120 MHz Operating system: Android 6 or higher, iOS 9.0 or higher Connection: D-SUB 9PIN connector Autoguider input ST4 Power consumption SXD2WL+Wireless unit: DC12V / 0.3-2.0 A (load 10 kg), 0.4-2.2 A (load 15 kg) SCOPE OF DELIVERYSXD2WL EQ mount Wireless unit 2 counterweights: 1.9 kg and 3.7 kg Mounting tools Pole finder PFL-II Cigarette lighter cable

£2,617.00*
LUNT CAA-RF 0.8x reducer/field-flattener for nighttime photography with LS80MT, LS100MT & LS130MT telescopes
​Field-flattener and focal length reducer for deep-sky astrophotography. Designed for the multipurpose APO telescopes of the Lunt-Solar-Systems LS80MT, LS100MT and LS130MT series.At the telescopes of the MT series from Lunt Solar Systems, the H-Alpha filter unit for solar observation can be removed, then these telescopes can be used as high quality ED APO's for observing and photographing the night sky.This accessory for the LS80MT, LS100MT and LS130MT telescopes shortens the focal length by a factor of 0.8x, providing a larger field of view for deep-sky astrophotography. This also allows shorter exposure times. At the same time, the field of view is flattened for photography.On the camera side, the reducer/field-flattener has a T2 male thread (M42x0.75). DSLR cameras can be connected here directly with a normal T2 ring.For other cameras, an M39x0.75 female thread is available in addition to the T2 male thread. The distance between reducer/field-flattener and camera sensor should be around 50 to 55mm. Normal T2 extension sleeves can be used to achieve this distance.On the telescope side, the following connections are provided: 2 inch socket, M54x0.75 male thread, M63x1 male thread and M68x1 male thread.FEATURESShortens focal length of F/7 ED telescopes by a factor of 0.8xFlattened field of view for photographyT2 thread for camera connectionWorking distance 50 to 55mm2 inch socket and M54x0.75 thread for connection to telescopesAdapter to M63x1 and M68x1Weight only reducer/field-flattener: 0.25kgWeight together with adapter to M63 & M68: 0.36kgSCOPE OF DELIVERY0.8x reducer/field-flattenerAdapter to M63x1 and M68x1

£598.00*

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LUNT O-ring for Pressure-Tuner at LS50THa solar telescopes
​Spare part for Pressure-Tuner of LS50THa H-alpha solar telescopes from LUNT SOLAR SYSTEMSA rubber O-ring is installed into the Pressure-Tuner of Lunt Solar Systems LS50THa solar telescopes to seal the air-pressure tuning system. Over time, the rubber of this O-ring can age and become porous, whereby the air-pressure can then no longer be maintained. When this happens, the old O-ring can be replaced by this spare part. The replacement is simple and can be done by the user. Installation instructions can be found here under the tab "Manuals" as a PDF for download.After replacing the O-ring, the piston and cylinder of the Pressure-Tuner can be re-greased with grease available under part number 0558350.Please note that this spare part can only be used on the Lunt Solar Systems LS50THa H-alpha solar telescopes. If the problem occurs on the larger THa or MT series telescopes, the larger O-rings with part numbers 0558330 or 0558340 must be used there.FEATURESInner-diameter: 31mmOuter-diameter: 39mmCannot be used separately, only as a replacement part on the Pressure-Tuner of the LS50THa telescopes from Lunt Solar Systems.It does not matter what blocking filter is at the LS50THaSCOPE OF DELIVERYSpare part one O-ring for pressure tuner of LS50THa

£5.00*
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EXPLORE SCIENTIFIC Sun Catcher Solar Filter for 9"- 10" SC Telescopes
Explore Scientific's Sun Catcher Variable Large Aperture Solar Filters are available in many sizes to work on most telescopes from 60mm up to 10-inch Schmidt-Cassegrain and of course all Bresser and Explore Scientific Telescopes. The Solar Filter material being used is the new advanced 'Solarlite' Film manufactured by world famous Thousand Oaks Optical through years of research and development. 'Solarlite' a new solar film that has the optical quality of glass with the advantages of impregnated polymer. Perfect also for the solar astrophotographer.NOTE: All Explore Scientific Solar Equipment is rated ISO12312-2 supplied by Thousand Oaks Optical and approved for direct observation of the Sun. These solar filters are available in different sizes, the picture above shows three different sizes as an example. This is the solar filter with 203mm filter diameter.SPEZIFICATIONSSpecial objective filter for safe solar observationsISO12312-2 ratedField-stop diameter 203mmFits to outer telescope tube diameter from 200 to 280mmQuick individual match with your telescope diameterFast Setup - Easy UseSCOPE OF DELIVERY1x Sun Catcher solar filter

£30.00* £59.90* (49.92% saved)
EXPLORE SCIENTIFIC Sun Catcher Solar Filter for 80-102mm Telescopes
Explore Scientific's Sun Catcher Variable Large Aperture Solar Filters are available in many sizes to work on most telescopes from 60mm up to 10-inch Schmidt-Cassegrain and of course all Bresser and Explore Scientific Telescopes. The Solar Filter material being used is the new advanced 'Solarlite' Film manufactured by world famous Thousand Oaks Optical through years of research and development. 'Solarlite' a new solar film that has the optical quality of glass with the advantages of impregnated polymer. Perfect also for the solar astrophotographer.NOTE: All Explore Scientific Solar Equipment is rated ISO12312-2 supplied by Thousand Oaks Optical and approved for direct observation of the Sun. These solar filters are available in different sizes, the picture above shows three different sizes as an example. This is the solar filter with 90mm filter diameter.SPEZIFICATIONSSpecial objective filter for safe solar observationsISO12312-2 ratedField-stop diameter 90mmFits to outer telescope tube diameter from 90 to 160mmQuick individual match with your telescope diameterFast Setup - Easy UseSCOPE OF DELIVERY1x Sun Catcher solar filter

£25.90*
EXPLORE SCIENTIFIC Sun Catcher Solar Filter for 60-80mm Telescopes
Explore Scientific's Sun Catcher Variable Large Aperture Solar Filters are available in many sizes to work on most telescopes from 60mm up to 10-inch Schmidt-Cassegrain and of course all Bresser and Explore Scientific Telescopes. The Solar Filter material being used is the new advanced 'Solarlite' Film manufactured by world famous Thousand Oaks Optical through years of research and development. 'Solarlite' a new solar film that has the optical quality of glass with the advantages of impregnated polymer. Perfect also for the solar astrophotographer.NOTE: All Explore Scientific Solar Equipment is rated ISO12312-2 supplied by Thousand Oaks Optical and approved for direct observation of the Sun. These solar filters are available in different sizes, the picture above shows three different sizes as an example. This is the solar filter with 60mm filter diameter.SPECIFICATIONSSpecial objective filter for safe solar observationsISO12312-2 ratedField-stop diameter 60mmFits to outer telescope tube diameter from 60 to 160mmQuick individual match with your telescope diameterFast Setup - Easy UseSCOPE OF DELIVERY1x Sun Catcher solar filter

£24.90*
LUNT Solar Eclipse Glasses (1 piece)
Observe solar eclipses, sunspots, and airplane flybys in front of the sun safely with these glasses designed for direct solar observation.Manufactured to the same standards of safety typical to the entire family of Lunt Solar Systems products - the premium manufacturer of Solar telescopes and filters. FEATURESproduces a very natural light-yellow sun imageideal for safe visual observation of the sun very resistant to damage 100% safe SCOPE OF DELIVERYSolar eclipse glasses (1 piece)

£5.90*
Adapter T2 to 2", for 2" eyepieces to blocking filter
Adapter T2 to 2", takes for example 2" eyepieces to Lunt Solar Systems blocking-filters.This adapter offers a T2 female thread at the telescope-side, and a 2" connection at the eyepiece-side.For example you want to use your 2" eyepieces at Lunt Solar Systems telescopes or filters? All you need is this adapter. Simply remove the 1.25" eyepiece tube from your blocking-filter, and thread on this 2" adapter. It takes T2 threading to a 2" eyepiece tube.You can use 2" eyepieces with this adapter at:• LUNT H-alpha telescopes (not at LS35THa!)• the blocking-filters of LUNT H-alpha filter systems• LUNT Ca-K modules• all telescopes/adapter with T2 male threadTechnical data:• Thread at telescope-side: T2 female thread• Eyepiece connection: 2"Delivered by order:• Adapter T2 to 2"(Blocking Filter not included)

£27.00*
LUNT Mini SUNoculars red
​Small 6x30 binoculars for solar observing in White-Light.This truly pocket sized binoculars with 6x magnification are only for solar observing. You can view and safely study large Sun-spots, transits and solar eclipses. The Sun's image shows in a pleasing  orange colour, rather in a harsh blue-white, as it does in some other white light filters.Lunt Mini SUNoculars have White-Light filter film installed inside the binoculars. This makes solar observation 100% safe. The light of the sun is reduced to a comfortable 0.00001% transmission and all ultra-violet and infrared components are completely and safely blocked.Lunt SUNoculars are manufactured to the same standards of safety typical to the entire family of Lunt Solar products - the premier manufacturer of Solar telescopes and filters.FEATURESMagnification: 6xObjective lens diameter: 30mmEye relief: 9mmTransmission: 0.00001% (OD5)Filter type: Solar film, CE certifiedLength: 105mmWidth: 110mmWeight: 160gSCOPE OF DELIVERYMini SUNoculars in blister packStrap

£34.90*
LUNT Grease for Pressure-Tuner at MT & THa solar telescopes
Spare part for Pressure-Tuner of MT and THa series H-alpha solar telescopes from LUNT SOLAR SYSTEMSFor example, if the O-rings have been changed on a Pressure-Tuner of a Lunt Solar Systems H-alpha solar telescope, the Pressure-Tuner can be re-greased with this grease. The grease can be applied to the piston with the O-rings and to the threads of the brass cylinder on the Pressure-Tuner. It keeps the Pressure-Tuner running smoothly and seals it.Please note:Do not use too much grease inside the brass cylinder. The grease must not get into the air passage at the bottom of the brass cylinder, otherwise the Etalon could be damaged in the worst case.FEATURESLithium grease with Teflon contentVery good sealing propertiesHigh adhesion and good corrosion protectionTemperature stable from -20 to +120° CelsiusConstant viscosity during temperature fluctuationsSCOPE OF DELIVERYSpare part: Grease for Pressure-Tuner of MT and THa H-alpha solar telescopes from Lunt Solar Systems

£2.50*

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LUNT LS100MTBP&F Conversion Kit for LS100MT
​The LS100MT solar telescopes can be upgraded with this optional conversion kit. This allows the telescopes to be used as 3-lens ED apochromatic refractor for observation and photography of the starry night sky.The H-Alpha system of the LS100MT telescopes can be easily replaced by this conversion kit. The conversion kit offers a very high quality and solid R&P focuser. Even the heaviest cameras or other accessories will be hold without any problems and can be focused sensitively by the integrated 10:1 reduction.Simply loosen three knurled screws holding the H-Alpha unit including the focuser at the LS100MT. Attach here the new focuser, and your LS100MT is transformed into a full 3-lens apochromatic telescope. The new focuser offers 95mm focusing way with backlash- and tilt-free mechanics also when using heavy accessories. A 2 inch ring-clamp is directly at the focuser, and an adapter to 1.25 inch also with ring-clamp is included in delivery.But this is not all: With this conversion kit Herschel-wedges or Ca-K modules can be used at the LS100MT telescopes for solar observation. This makes it possible to observe the sun in H-alpha, in Calcium-K wavelength light, or in White-Light - with one and the same telescope!This conversion kit turns the LS100MT into a real all-round telescope!FEATURESBacklash- and tilt-free mechanics95mm focusing way10:1 reduction2 inch and 1.25 inch ring clampingSCOPE OF DELIVERYHigh quality 2 inch focuser with adapter to LS100MT telescopesAdapter from 2 inch to 1.25 inchInstruction manualLS100MT telescope not included! Can only be used together with a LS100MT solar telescope. This conversion kit is absolutely necessary if a LS100MT telescope should be used for night sky observation.

£379.00*
LUNT Solar Eclipse Glasses (5 pieces)
Observe solar eclipses, sunspots, and airplane flybys in front of the sun safely with these glasses designed for direct solar observation.Manufactured to the same standards of safety typical to the entire family of Lunt Solar Systems products - the premium manufacturer of Solar telescopes and filters.FEATURESproduces a very natural light-yellow sun imageideal for safe visual observation of the sunvery resistant to damage100% safeSCOPE OF DELIVERYSolar eclipse glasses (5 pieces)

£16.90*
LUNT Blue-Glass 20mm for B400 to B1800 blocking-filters
​Spare part for blocking-filters from LUNT SOLAR SYSTEMS, suitable for B400, B500, B600, B1200 and B1800 blocking-filters.The H-alpha telescopes and filter systems from Lunt Solar Systems each include a blocking-filter. The blocking-filters have a blue colored filter part on the side facing the telescope. This blue colored filter parts may become a milky white layer at older blocking-filters if the blocking-filter was storded at high air humidity for some time. Please always store H-alpha telescopes and filters as dry as possible. If this blue colored filter part has become a milky white layer, it can be replaced with this spare part. The replacement is easy and can be done by the user himself. Installation instructions can be found here under the "Manuals" tab as a PDF for download.Please note that this replacement part can only be used on Lunt Solar Systems blocking-filters B400 to B1800. If the problem happens with the large B3400 blocking-filter, the B3400 must be sent to our service department for repair.FEATURESDiameter: 20mmCannot be used separately, only as spare part at blocking-filters from Lunt Solar SystemsFor B400, B500, B600, B1200 and B1800 blocking-filtersIt does not matter if the blocking-filters are installed in 90° zenith-mirrors or straight extension-tubesSCOPE OF DELIVERYSpare part 20mm blue glass for B400 to B1800 blocking-filters

£15.00*
BRESSER Classic 60/900 AZ Refractor Telescope
60 Years BRESSER 1957-2017 Anniversary Edition - BRESSER Classic long focal length Refractor telescopesObserving the night sky through the BRESSER Classic telescope like Galilieo Galilei or Joseph von Fraunhofer centuries ago is a very special experience. Gaze at the craters of the moon or detect the rings of Saturn with your BRESSER Classic. The telescope is equipped with an alt-azimuth mount and provides exquisite views onto the surface of earth's neighbour, the moon. The sharp optics and low weight of the BRESSER Classic make it a versatile beginner's telescope for the young and young at heart astro amateur. The classical lens system with a diameter of 60mm and a focal length of 900 mm yields excellent image quality. The alt-azimuth mounting with vertical adjustment and rugged aluminium tripod perfectly round off this beginner's set.With the including smartphone camera holder you are able to capture your observation objects and share it with your friends, family etc. The alt-azimuth mount of this refractor telescope ensures an easy and quick introduction to astronomy. This telescope is particularly suited to observing celestial bodies in our solar system such as the moon or the nearer planets. The attached accessories and the astronomy software included mean beginners can rapidly achieve success.FEATURES beginner's set with all necessary accessories to start observing immediatelyoptical system: achromatic refractoralt-azimuth mountastronomy software for an easy start into astronomy even for absolute beginnersSCOPE OF DELIVERYtelescopealt-azimuth mount5x24 viewfinderErecting lens 1,5x diagonal mirror  1.25" (31,7 mm)eyepieces 1.25" (31,7 mm): 4mm, 12,5mm und 20mmaluminium tripod with accessory trayastronomy software (download version)smartphone camera adaptermanual

£115.00*
BRESSER Pegasus 130/650 EQ3 Reflector Telescope with Accessories
Who doesn't dream of exploring the beauties of the universe with their own eyes? This complete telescope set allows you to make your first celestial observations immediately and very easily. It contains everything you need for your new hobby: a reflector telescope with 130 mm aperture and 650 mm focal length, an equatorial mount, a tripod and extensive accessories for astronomical observations. The system is easy to operate and very flexible. You can look forward to fascinating views of the Moon and planets. Star clusters and gas nebulae also look impressive through the user-friendly entry-level telescope. Easy start with the astronomy all-rounder – the telescope The set includes a true classic among the reflector telescopes, a so-called Newtonian reflector. With this type of telescope, you look in at the front of the tube instead of at the back. The advantage: the observing position always remains comfortable, even when the telescope is pointed vertically upwards. In addition to observing comfort, reflectors also impress with their optical performance. After all, they are absolutely free of chromatic aberrations and thus offer good imaging properties. Due to its 130 mm aperture, the entry-level telescope already collects a lot of light from the celestial objects. In addition, there is the short focal ratio (ratio of the aperture to the focal length) of 1 to 5 (F/5), which derives from the 130 mm aperture and the 650 mm focal length. As a result, the fast beginner's telescope shows a bright image and enables high magnifications. You also benefit from the flexibility of this astronomical telescope: Admire the fascinating view of open and globular clusters such as M13 in the constellation Hercules at low to medium magnification. Or marvel at gas nebulae such as the famous Orion Nebula M42. At high magnifications, on the other hand, the entry-level telescope brings you closer to the impressive planets and exciting details on our Moon. How big do the astronomical eye-catchers appear? Due to the resolving power achieved with the aperture of 130 mm, the telescope shows you sharp images at magnifications up to about 260x. With the included accessories, you can already reach 195x. The technology allows even more, but the image sharpness can decrease at even higher magnifications. However, it is not only the telescope that determines how much you can magnify. It also depends on the air turbulence in the atmosphere (seeing conditions). Note for nature lovers: If you choose a Newtonian telescope like the Pegasus reflector telescope, you can look forward to a specialist in astronomical observation. However, the image is always displayed laterally reversed as well as upside down, which makes no difference when observing the sky. However, this type of telescope is less suitable for nature and landscape observation during the day. Would you like to use your new telescope for exciting nature discoveries as well? Then we recommend that you choose one of the BRESSER refractor telescopes. User-friendly base – mount and tripod Found the perfect place for your celestial observations? Then you can start installing your astronomical telescope on the height-adjustable stainless steel tripod with equatorial mount. The advantage over azimuthal mounts: you only have to move along one axis instead of two. The reason is that you align the other one parallel to the earth's axis beforehand. This so-called "alignment" is very easy: you simply point the axis approximately at Polaris. In addition, the mount comes equipped with two flexible shafts with fine adjustment. Perfect for aligning and tracking the telescope particularly precisely and comfortably. Everything always within reach: on the practical storage plate, your accessories are quickly at hand if needed.Keep track of things automatically: For this telescope’s equatorial EQ-3 mount, the tracking motor with item number 4951400 is available as an optional accessory. This eliminates the need to manually track a celestial object set in the telescope. When this motor is installed at the mount, it automatically tracks the celestial object, keeping it in the field of view of the eyepiece. This makes observing the night sky even more comfortable! Complete astro package to start stargazing immediately – the accessories The comprehensive astronomy accessories make it easier for you to get started and enable you to see your favourite celestial bodies from completely different perspectives. To align the telescope and find your way around the night sky you can mount the LED finder parallel to the telescope. The method is simple: a red dot is projected onto a small ground-glass screen inside the viewfinder. When you look through the dot appears to hover in front of the sky – exactly at the point where the entry-level telescope is pointed. This way, you can easily find astronomical objects through the illuminated dot finder and then marvel at them in detail using the high magnification of your telescope. Vary your view of the stars: with the two eyepieces (10 mm and 25 mm), you can admire your nocturnal observation objects in two different magnifications. They are simply inserted into the eyepiece focuser of the telescope via their 1.25-inch-sockets, which is a standard diameter. You want to look even closer? Then the included 3x barlow lens can triple the magnification of the eyepieces. Explore the night sky on your own through the versatile BRESSER Pegasus 130/650 EQ3 reflector telescope. FEATURES Reflector telescope for beginners with 130 mm aperture and 650 mm focal length Reflector type: Newton Good for observing Moon, planets as well as star clusters and gas nebulae Height-adjustable tripod with equatorial EQ3 mount Precise positioning due to flexible shafts and fine adjustment in both axes Easy to use, very well suited for beginners Focal ratio F/5, thus well suited for many celestial objects 1.25 inch (31.7 mm) focuser Two eyepieces and a barlow lens with 1.25 inch (31.7 mm) sockets for different magnifications SCOPE OF DELIVERY Telescope Stainless steel tripod Equatorial EQ3 mount Eyepieces: 10 mm and 25 mm (1.25 inch sockets) Barlow lens 3x (1.25 inch socket) LED illuminated dot finder Accessory tray Astronomy software download Instruction manual

£295.00*
BRESSER 10x42 Roof Monocular Waterproof
Small and compact, it fits into any jacket pocket and is always ready to hand. The BRESSER Monocular 10x42 is a handy aid in many situations. For use in bad weather it is waterproof and has a water-repellent, robust rubber armouring. The 10x magnification allows you to get very close to the desired objects without disturbing animals. Furthermore, it is designed for single-handed use. The multi-coated BK-7 optic ensures good image quality. PROPERTIESmonocular for travellers, Hiker or animal observer waterproof COMPLETIONS monocular carrying strap monocular bag cleaning cloth instructions

£47.99*
ISA Space Exploration NASA-themed Telescope AR-102L/1350 EXOS-1/EQ4
Are you captivated by NASA's thrilling missions and eager to explore the night sky with your own telescope? Then look no further than the ISA Space Exploration NASA-themed Telescope AR-102L/1350 EXOS-1/EQ4. This telescope lets you marvel at the celestial highlights. Its long 1,350 mm focal length and f/13.2 aperture ratio make it perfect for observing planets, the Sun, and the Moon. Explore our solar system with this telescope From the famous gas giant to the popular ringed planet, this refractor telescope delivers sharp views of the planets with extremely low colour-aberration. The optics provide a vivid, almost three-dimensional image. Get ready for breathtaking views of Jupiter's cloud formations and Great Red Spot, Mars' polar cap, or Saturn's Cassini Division. And don't forget the star of our solar system: with the aperture solar filter, you can safely observe stunning sunspots, eclipses, and planetary transits. WARNING: Never point the telescope at the sun without the solar filter! User-friendly, high-quality telescope with many accessories This premium refractor comes with a variety of astronomy accessories so you can fully enjoy your stargazing adventures. The high-quality Hexafoc focuser allows you to use the included 26 mm eyepiece and also additional eyepieces (not included) with 50.8 mm or 31.7 mm barrel diameter. The smartphone adapter on the handle and Stellarium astronomy software make navigation easier. With the 6x30 finder with crosshair eyepiece and optimised finder mount, you can quickly and easily locate your targets. The star diagonal mirror ensures a comfortable viewing position during your observations. Stable mount for steady images The equatorial mount helps you keep celestial objects in view. Once aligned with the North Star – i.e. aligning one axis parallel to the Earth's axis – you only need to adjust one axis to track your targets. The two flexible shafts with fine adjustment make setting and tracking easy. The latitude scale for setting the latitude and the scaled graduated circular rings simplify the telescope use further. Naturally, the stable stainless steel tripod can be adjusted to your preferred height. Get ready to explore the day and night skies with the high-quality ISA Space Exploration NASA-themed Telescope AR-102L/1350 EXOS-1/EQ4.FEATURES High-quality achromatic refractor telescope with excellent mechanics Lens diameter: 102 mm / Focal length: 1350 mm / Aperture ratio: f/13.2 Maximum recommended magnification: 204x Telescope for night and solar observation with solar filter High-quality equatorial mount with fine drive in both axes Very high-quality Hexafoc focuser with 2.5'' free inner diameter 6x30 finder with crosshair eyepiece and optimised finder mount for comfortable viewing 31.7 mm (1.25'') star diagonal mirror 50.8 to 31.7 mm adapter with built-in T2 adapter (optional T2 ring required) Smartphone adapter included for sky navigation Latitude scale for setting the latitude Scaled graduated circular rings for easier object finding using a star atlas or planetarium software Handle for comfortable transport with built-in camera holder (photo thread screw) Stable, height-adjustable stainless steel tripod (63-106 cm) SCOPE OF DELIVERY Optical tube 26 mm Super Plössl eyepiece (31.7 mm / 1.25") 31.7 mm (1.25") star diagonal mirror Built-in 31.7 mm and T2 adapter Prism rail with stainless steel clamping surface 6x30 finder scope Rotatable star map Aperture solar filter Tube clamps with handle and camera holder Smartphone adapter for navigation Astronomy PC software Stellarium (via download) Equatorial mount Stainless steel tripod 1x 4.5 kg counterweight Instruction manual

£654.90*