EXPLORE SCIENTIFIC OPTOLONG 1.25" L-Pro Deep-Sky Light Pollution Filter

Product Highlights

The L-Pro Filter is the best choice for light pollution suppression and allows astrophotos to be taken of broadband emission objects such as galaxies, reflection nebulae and globular star clusters.

  • Professional visual and photographic filter for astronomy
  • Improves deep sky nebula constellation photography
  • Best choice for light pollution suppression
  • Filter diameter: 1.25 inch / 31.7mm
  • Connecting thread: M28.5 x 0.6mm (Eyepiece thread 1.25 inch)
  • Fine-optical polished glass to ensure accurate 1/4 wavefront
  • High transmission at major nebula emission lines
  • Precision off-band blocking, specifically the major emission lines of artificial light pollution
  • Offers better color balance by maximizing the transmission band
  • Multi-layer anti-reflection coatings for highest image contrast

£158.00*

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Product number: 0310155
GTIN/EAN: 4007922072852
Product information "EXPLORE SCIENTIFIC OPTOLONG 1.25" L-Pro Deep-Sky Light Pollution Filter"
LPS filter L-Pro for deep sky nebula constellation photography.
The relentless spread or urbanization and its associated light pollution have become a growing problem for all amateur astro photographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel. Especially with inexpensive newtonian telescopes, double-lens ED refractors or even achromats, the L-Pro filters open up completely new possibilities for the capture of high-class astronomical images even out of the light polluted city. CMOS cameras can deliver images like monochrome cameras. This new generation of filters makes it possible to take amazing astrophotos directly from the light-polluted city with all its artificial light sources.
L-Pro is a multi-bandpass filter which offers better color balance by maximizing the transmission band. The balanced transmission allows astrophotos to be taken with minimal color cast to broadband emission objects such as galaxies, reflection nebulae and globular star clusters. L-Pro is the best choice for light pollution suppression.

L-Pro description
L-Pro (L-Professional) filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm) as well as SII (672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural areas with heavy light pollution. L-Pro is a multi-bandpass filter which offers better color balance by maximizing the transmission band. The balanced transmission allows astrophotos to be taken with minimal color cast to broadband emission objects such as galaxies, reflection nebulae and globular star clusters. L-Pro is the best choice for light pollution suppression.

Main use and performance
Suitable for visual observation and astrophotography. L-Pro filter has a very low transmission reduction rate against continuous spectrum space objects, and thus is quite effective in suppressing light pollution sources when shooting galaxies, reflection nebulae and globular star clusters. The same holds true for visual star observations. L-Pro filter alone can suppress infrared wavelength, and thus can be used at ease for ''L'' image shootings with CCDs. Light pollution filters do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.

WARNING: These nebula filters are not designed for sun observation. DO NOT LOOK AT THE SUN WITH THIS FILTER. You will go BLIND if you ignore this warning.

Coating technology
L-Pro has a multiple anti-reflective coating on the optical substrate. The L-Pro filter uses a precision coating based on ion deposition coating technology. This ensures durability and scratch resistance as well as stability on the CWL (central wavelength), which is not affected by temperature changes. Absolute precision and homogeneity of the coatings as well as maximum values for transmission in the passband and optical density in the off-band range are guaranteed for all filters.


FEATURES
  • Professional visual and photographic filter for astronomy
  • Improves deep sky nebula constellation photography
  • Best choice for broadband light pollution suppression
  • Filter diameter: 1.25 inch / 31.7mm
  • Connecting thread: M28.5 x 0.6mm (Eyepiece thread 1.25 inch)
  • Selected optical glass material
  • Spectrum: 380-750nm
  • Surface Quality: 60/40 (Refer to MIL-O-13830)
  • Fine-optically polished glass to ensure accurate 1/4 wavefront and highest parallelism over the both surfaces
  • High transmission at major nebula emission lines (i.e. H-alpha 656nm, OIII 496nm&500nm, SII 672nm and H-beta 486nm)
  • Precision off-band blocking, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm and 578nm)

SCOPE OF DELIVERY
  • L-Pro filter (1pc)
  • Dust protection box (1pc)
Colour: black
Field of application [Telescope-filter]: Light Pollution Filter for Astrophotography
Material: Glass, Plastic
Telescope filter type: Nebula filter

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If you like, simply switch off the automatic settings and gradually dare to adjust the individual professional settings. The new EXPLORE SCIENTIFIC DEEP SKY camera has a highly sensitive and very low-noise SONY Exmor IMX428 CMOS sensor which is additionally cooled down to 40°C below ambient temperature by the two-stage thermoelectric cooling. In contrast to normal DSLR cameras, this guarantees much lower noise and fewer hot pixels in your shots. The images are not only much sharper and more brilliant, but also contain more usable image information. Through the controlled setting of the desired camera temperature, the creation of dark frames under reproducible shooting conditions is possible at any time. The large-format CMOS sensor with 17,6mm diagonal also allows large image fields and simplifies the adjustment and centering of objects considerably. The camera has a built-in USB hub with 2 x USB2.0 ports at the rear. Connect your additional autoguider camera or motor focus etc. via a short USB cable and reduce the risk of cable spaghetti and cable breaks. Separate cable connections between your accessories and your computer are no longer necessary. A sturdy hard case for the camera plus accessories is also included. IMPORTANT NOTES: Don't get confused by the megapixel data and the contrary price structure. In the field of astronomy, the key criterion is not the sensor resolution but the maximum light sensitivity. The main goal is to capture as much light as possible in a short time.DOWNLOAD latest camera software and drivers see download folder "Manuals" or here: http://www.touptek.com/download/showdownload.php?lang=en&id=2 Sample photos made by Lóránd Fényes in Hungary: https://fenyeslorand.hu/asztrofotok/Field of view for different focal lengths in arc minutes and degrees: 400 mm - 124´x 85´ (2.1 x 1.4 degrees) 500 mm - 99´x 68´ (1,7 x 1.1 degrees) 600 mm - 82´x 56´ (1.4 x 0.9 degrees) 700 mm - 70´x 49´ (1.2 x 0.8 degrees) 800 mm - 62´x 43´ (1.0 x 0.7 degrees) 900 mm - 55´x 38´ (0,9 x 0.6 degrees) 1000 mm - 49´x 34´ (0.8 x 0.6 degrees) 1250 mm - 40´x 27´ (0.7 x 0.5 degrees)1500 mm - 55´x 23´ (0.6 x 0.4 degrees) 1750 mm - 28´x 19´ (0.5 x 0.3 degrees) 2000 mm - 25´x 17´ (0.4 x 0.3 degrees) FEATUREScamera type: ASTRO Camera  7.1MP ATR3CMOS07100KPA data output: single pictures and video image Sensor: SONY Exmor IMX428 CMOS Color Sensor resolution: 3200x2200 binning: 1x1 / 2x2 frame rate per second (FBS): 51 / 133 physical sensor size in pixels: 3200 x 2200 / 1600 x 1100megapixel: 7.1 MP sensor size: 14.4 x 9.9 mm (1.1 inch) pixel size: 4.5 µm x 4.5 µm bit depth: 12 Bit backfocus: 17,5 mm  shutter Type: global shutterinternal camera memory: DDR 3 RAMthermoelectric cooling with fan: yes, up to 40°C below ambient temperature adjustable exposure times: 150µs to 60min operating temperature: -10 to +50°C (30-80% RLH) cable length USB 3.0: 150cm DC cable length power supply: 200cm CNC machined aluminium housing camera diameter: 80mm; length: 102mm camera weight: 0,53 kg camera connection diameter: 2.0 inch ( 50.8mm) camera connection thread: T2 (M42x0,75mm) filter thread: Yes, 2.0 inch in receptacle camera connection to PC: USB 3.0 built-in USB hub with 2 x USB 2.0 ports power supply: Power supply 12 Volt 3,0 Ampere included software: EXPLORE Capture included camera driver and ASCOM driver includedoperating system: WINDOWS 10 + 11PC requirements: CPU Intel Core2 2.8Ghz or higher / 2 GB Ram / USB 3.0 SCOPE OF DELIVERYDEEP SKY ASTRO Camera 7.1MP telescope adapter T2 thread to 2.0'' (50,8mm) USB 3.0 connection cable 150cm power supply 230V/12V3,0A dust cap software CD hard case instruction manual

£1,195.00* £2,253.00* (46.96% saved)
BRESSER Full HD Deep-Sky Camera & Guider 1.25"
BRESSER Full HD Deep Sky Camera with autoguider: a great camera for different types of astrophotography and for autoguiding. Not only suitable for planets, but also for deep-sky objects such as galaxies, nebulae and star clusters. Dedicated ToupSky Astro Imaging software supports video preview, video recording, video processing, image capture and processing, dark field correction and raw data output. Easy to use, but with professional results. One of the main features of the new backlit SONY IMX290 CMOS sensor is its high light sensitivity, which makes it possible to detect deep-sky objects without active cooling. SONY has increased the quantum efficiency at 533 nm wavelength up to 77%, which is much better than other CMOS sensors have been able to achieve in the past. Connect this camera to a guidescope and attach the camera's built-in ST-4 port, directly to your telescope's equatorial mount guide port and autoguide - using many popular audioguiding programs (PHD, Guidedog and more). Autoguiding enables you to take accurate pictures with long exposure times of several minutes. Thanks to the extra light-sensitive camera, you now always have a suitable guide star to hand, even using short exposure times. An ST-4 protocol connection cable is also included. Simple automatic tracking at its best. You can use this camera with all guiding telescopes, or off-axis guiders that accept a 1.25 " tube, 1.25" filter thread (M28.5x0.6) or C-mount adapter thread (1 "x1 /32"). IMPORTANT NOTES: This is not a stand-alone guider camera. You always need a Windows 10/11 computer to take pictures and for autoguiding. The autoguider software is not included. You can use PHD2 Guiding, Guidedog, Metaguide, Guidemaster (freeware) or AstroArt, MaxIm DL (paid). DOWNLOAD PHD2-Guiding: https://openphdguiding.org/ DOWNLOAD GuideDog: http://barkosoftware.com/GuideDog/index.html DOWNLOAD latest camera software and drivers: http://www.touptek.com/download/showdownload.php?lang=en&id=2 SPECIFICATIONS Camera type: BRESSER / Touptek GPCMOS02000KPA color Sensor: SONY IMX290 CMOS color, backlit Image and video size: Full HD 1936 x 1096 pixels (video 15 FPS) Native sensor size in pixels: 1936 x 1096 Exposure times: 66µs to 16min Binning: YES, 2x2 Megapixel: 2.1 MP Sensor size in mm: 5.6 x 3.1 Pixel size: 2.9 µm x 2.9 µm Bit depth: 8/12 switchable ST-4 Compatible Autoguider: YES CNC milled housing made of aluminum Protective strap on the camera housing Camera tube diameter: 1.25 "(31.7 mm) Camera connection thread: C-mount + 1.25 "filter thread Computer interface: USB 2.0 C-mount extension tube with 1.25 inch filter thread included No IR cut filter installed Operating system: WINDOWS 10 + 11 ASCOM driver included Field of view for different focal lengths in mm (given in arc minutes): 400mm - 48.2 'x 27.3' 500 mm - 38.6 'x 21.8' 600 mm - 32.1 'x 18.2' 700 mm - 27.5 'x 15.6' 800 mm - 24.1 'x 13.6' 900 mm - 21.4 'x 12.1' 1000 mm - 19.3 'x 10.9' 1250 mm - 15.4 'x 8.7' 1500 mm - 12.9 'x 7.3' 1750 mm - 11.0 'x 6.2' 2000 mm - 9.6 'x 5.5' SCOPE OF DELIEVERY Full HD camera C-mount adapter USB 2.0 PC connection cable with a length of 200cm Interface cable for ST-4 autoguider port with 150cm length Dust cap for camera tube Software CD

£270.00*
BRESSER Telescope Camera Adapter (1.25")
The BRESSER Telescope Camera Adapter is the connecting piece between your 35 mm DSLR camera and the telescope. The connection to your camera can be achieved with the fitting T2-mount (T2-mount optional). For the focal fotography, you need to unscrew the bottom part of the adapter and attach the camera with the fitting T2-mount directly to the push-on contact. The eyepiece projection is possible when you put an eyepiece into the adapter and tighten the knurled screw. After that, you have to attach the T2-mount and the camera and you are ready to go.FEATURESEyepiece connection diameter: 31.7 mm (1.25")Eyepiece total diameter max. 35mm  SCOPE OF DELIVERYTelescope Camera Adapter 1.25"

£36.00*

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