EXPLORE SCIENTIFIC 2" O-III Nebula Filter

This carrying handle is suitable for installation on BRESSER MESSIER 6, 8 and 10 inch Dobson telescopes. In combination with the optionally available prism rail (GP standard) Art. No. 4940140, these Dobson telescope tubes can be used on any telescope mount with the appropriate carrying capacity. A comfortable transport of the tube is guaranteed by the mounting in the center of gravity. The carrying handle is also suitable as a spare part for all other MESSIER telescopes. FEATUREScarrying handle for 6 , 8 and 10 inch MESSIER Dobson telescopeswhen using telescopic tubes on EQ mountsconvenient transport due to central assemblythe assembly is carried out on the original tube ringsalso suitable as spare part for all MESSIER telescopesassembly material and tools includedlength: 190mm; Width: 30 mm; Height: 38 mmbore spacing: 160 mm; Bore diameter: 6.5 mm SCOPE OF DELIVERYcarrying handlemounting screws (2 pieces; 1/4 inch)hex wrench tool (3/16 inch)

A new focal length joins the Explore Scientific line of inert gas-purged Waterproof Eyepieces with the 3mm 52° LER Series Eyepiece. A logical companion for the grab-and-go ED APO 80mm f/6 Air-Spaced Triplet, this eyepiece produces 160X which will perform very well with good seeing conditions on planetary objects, and to split double stars. On the ED APO 152 at f/8, 405X is achieved without the use of a Focal Extender or Barlow for those nights of near perfect seeing, with a very comfortable 15mm of eye relief. Comfort, Quality, Value. The Explore Scientific 52° LER Series Most short focal length eyepieces are excellent flat-field multi-element oculars that can transform your visual astronomy experience. With an apparent field of view of 52 degrees, these eyepieces offer incredible value in a very nice eyepiece. Expect exceptional quality and value versus a comparably priced Plossl.  These eyepieces are the choice for observers wearing glasses - with excellent performance and durability. The rubber inlet and the foldable eyecups make handling and using in the field easy. The patented EMD-coating produces high contrast images and prevents reflexes and ghosting. The argon purging effectively prevents internal fogging, and you don´t have to deal with dirt, fungus or cleansing fluids getting between the lenses. The eyepieces are sealed - this makes sure you will be able to enjoy these eyepieces for many years to come.SPECIFICATIONSLarge eye distance, large field and great image sharpnessExcellent viewing position for people with glassesExcellent field sharpness even with fast optics52° apparent field of viewArgon-purging prevents internal fogging, the sealing facilitates cleaningPatented EMD-coating to maximize contrastBlackened lens edges to avoid reflexesAll eyepieces of this series are parfocalStainless steel barrel with conical security cutoffDust covers and protective bag includedSCOPE OF DELIVERY52° EyepieceDust coversProtective bag

With the introduction of the 68° Series we are pleased to make two important improvements in eyepiece manufacture, the first being 15 layer Enhanced Multi-layer Deposition (EMD™) coatings on all glass-to-air surfaces to gain maximum contrast, and waterproofing the eyepiece with the use of Argon gas purging instead of standard Nitrogen gas. Although Nitrogen is a fine choice that will last for many years, Argon is a larger molecule that maintains its protective properties over a wider range of temperatures, and is even more resistant to diffusion thereby further extending the protective waterproof environment of the eyepiece body. Through computer-optimized design, a careful selection of optical glasses, and enhanced multi-layer deposition coatings, the Explore Scientific 68° Series™ eyepieces produce long eye-relief and ensure high image-correction, a flat field, and high contrast across the entire image field. An excellent choice for those who make extended visual studies of detail with subtle variations of brightness, and for those who must wear glasses while observing. All 68° Series eyepieces are fully EMD (Enhanced Multi-Layer Deposition) coated and edge-blackened to produce superior contrast.

Explore Scientific 82° Series™ extreme wide field eyepieces are optimized to produce high contrast, high resolution, and superior flat field characteristics. The visual effect of these eyepieces with their long eye-relief and their 82° apparent field is truly a full-immersion experience. Your eye is relaxed, allowing you to easily use the "averted vision" technique to study faint details across a huge field-of-view. The 82° Series eyepieces come with a twist-up rubber eye-guard that raise to the desired height for the comfort of the observer, and as experienced astronomers know, eye comfort is critical when trying to observe at the visual limits of the telescope. To keep internal reflections to a minimum, all internal surfaces of the eyepiece barrel are flat black, as well as the edges of the lenses themselves to minimize the scattering of light within the lenses themselves. All 82° Series eyepieces are fully multi-coated and edge-blackened to produce maximum contrast.

Do it like the pros... You already own a BRESSER EXOS-2 mount and want to take a big step forward? Then set off for new astronomical shores with the new Nebula Goto Kit. This modern system offers you several options for control. You can operate the mount directly via its own Nebula control interface using your smartphone or tablet (iOS and Android supported). Alternatively, you can also use a planetarium software like SkySafari. Of course, manual control remains an option. For this, a handbox for minor corrections or simple control commands is included in the delivery.Moreover, with the BRESSER Nebula Goto Kit, you can connect your laptop or PC directly via WLAN or LAN cable (recommended for faster data transmission) to the Nebula control unit. This not only gives you full control over the mount, but also allows you to connect several devices such as cameras, motor focus, filter wheel, etc., directly to the control unit via various USB ports. This eliminates the need to connect each device to your computer via cables. The pre-installed program KStars / EKOS lets you comfortably control all devices from your PC or laptop. Electronic polar alignment or guiding can also be easily implemented with the Goto Kit, provided you have a camera connected. Additionally, you are not limited to the software of the Nebula control unit. Thanks to the installed ASCOM Alpaca driver, you can use your own programs on your computer to control the mount - be it Stellarium or N.I.N.A. The two stepper motors with a belt drive ensure a smooth, direct drive of the two axes. It is only important to have a good balance. FEATURES Belt drive for more precise, quieter tracking Stepper motors with high resolution (0.36´/microstep) Hand control box for direct control of the mount Virtual hand control box for smartphones and tablets PC control – ASCOM compatible USB ports for cameras, motors, filter wheels, etc. SCOPE OF DELIVERY 2 stepper motors for both axes (RA and DEC)Raspberry Pi control unitBasic handbox230V / 12V / 3 A power supplyConnection cableManual for download

Universal dovetail clamp suitable for all optical tubes which are equipped with a standard 44mm dovetail rail (Messier/ES/GP/Vixen).  Also a screw kit is included for mounting the dovetail clamp direct on the top of the handle of all BRESSER Messier und EXPLORE-SCIENTIFIC telescopes. Thus a parallel mounted guiding telescope can be set up very easy and enables long exposure astrophotagraphy with autoguiding.  The prism clamp has 2 x 6mm countersunk holes (35mm hole spacing) and 3 additional 1/4" photo tapped holes at 120 degrees angular distance on a pitch circle diameter of 55 mm to allow a versatile adaptation to a variety of other telescopes and adapter plates.FEATURESUniversal dovetail clamp  Suitable for 44mm dovetail rail of Messier/ES/GP/Vixen  Screw set for Messier/ES handle included For piggy-back mounting of a guiding telescope Enables astrophotography with autoguiding CNC machined Aluminum Additional 1/4" photo thread holes available SCOPE OF DELIVERY Dovetail clamp Screw set (2pcs M6x25mm)

Apart from air turbulence, the brightening of the night sky is the greatest barrier to observing faint objects beyond the solar system. Due to streetlamps and other artificial lighting, the sky in urban areas is no longer properly black. As a result, the contrast and thus the perception of deep-sky objects also suffer. However, depending on the type of celestial object, it is possible to filter out some of the interfering light making it easier to photograph the objects.The EXPLORE SCIENTIFIC H-Alpha filter uses the characteristic of the so-called emission nebulae. These objects glow in certain colors, the so-called emission lines. The emission lines are associated with certain chemical elements - in this case the red glowing hydrogen. This filter blocks all other colors (and therefore almost all artificial light) and lets only the emission lines of hydrogen through. Especially the interfering light of mercury and sodium vapor lamps is effectively blocked. The effect is amazing: suddenly, nebulae become visible on photos in locations which appear completely empty without the filter.The EXPLORE SCIENTIFIC H-Alpha Nebula filter has been developed exclusively for astrophotography. Especially in slightly light-polluted skies many emission nebulae only become visible and are shown in full expanse on astrophotos when using this filter. The H-Alpha nebula filters make astrophotography near the city possible and the use leads to amazingly good image results despite the existing light pollution. A must for every urban astrophotographer.The EXPLORE SCIENTIFIC nebula filters are delivered with an individual test report - so you can be sure to get high quality filters.FEATURESH-Alpha filters are used for astrophotography exclusivelyAllows photography of emission nebulae that glow in the light of red hydrogenMany of these emission nebulae are only visible in their full expansion in the photos taken with this filterBlocks almost all artificial light, especially from mercury and sodium vapor lampsOnly allows the emission line of red hydrogen to pass throughTransmission bandwidth: 12 nmAllows more contrast and detail for all urban astrophotographersIdeal for use near cities, in slightly brightened skiesIndividual test certificate included to guarantee you receive a premium filterSCOPE OF DELIVERY1x 2'' H-Alpha Nebula Filter