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B07Q86RY1C Availability: Currently unavailable Score: 1000.000 Category: Electronics Rating: 4.2 Votes: 5 Find similar products Baader Planetarium 2 MPCC V-1 Mark III Newton Multi Purpose Coma Corrector, Visual and Photographic Set. Coma corrector for Newton telescopes, that neither reduces the focal length nor the image field of your telescope. Large parabolic mirrors are perfectly apt for Deep Sky imaging since they deliver a very large field and enable very short exposure times. However this comes at the price of off axis coma and some residual astigmatism. Coma will distort off axis stars into comets which effectively reduces the usable field considerably. Many companys offer various lens systems as solution to counteract coma, most at the downside of increasing the original focal length and reducing the field of view. An f4 optics may become an f4.5.	B01066PM46 Availability: Currently unavailable Score: 6.579 Category: Electronics Rating: 5 Votes: 4 Find similar products Sky-Watcher Quattro 300P Imaging Newtonian - Large Aperture 12-inch Reflector Optical Tube for Astrophotography. The Quattro Imaging Newtonian is one of the most affordable telescopes with a f/4 focalratio. This astrograph is capable of producing an exposure 6x faster than any f/10 optical tube.Even pricey refractors have trouble reaching a focal ratio this fast. Using a faster optical tubewill shorten the exposure time, giving you more time to photograph nebulae, clusters, and otherdeep sky objects.Like all Sky-Watcher reflectors, our Quattro Imaging Newtonian features aluminum-coated borosilicate mirrors with a quartz overcoat, producing 94% reflectivity. The opticalsystem uses an oversized secondary mirror, providing greater illumination for DSLRs and CCDsusing full-frame sensors. The optical tube is constructed with rolled steel, and features Sky-Watcher’s signature metal-flake Black Diamond finish on the exterior. The interior of the opticaltube uses knife-edge baffles to absorb any stray light from ruining your images.As customary with all Sky-Watcher telescopes, a boat-load of accessories are bundledwith the optical tube. First is a 2-inch dual-speed 10:1 focuser with included 1.25-inch eyepieceadapter, which provides flexibility for either 1.25-inch or 2-inch eyepieces. Also included aretube rings and a V-style dovetail plate, as well as a 9x50 finderscope. For photographerslooking to create a flat field and eliminate vignetting, an optional coma corrector is availableseparately. Parabolic mirrors normally produce some aberrations around the edge of the field ofview (coma), so this corrector is highly recommended for users with large imaging sensors and full-frame DSLRs.
B0053ZUW28 Availability: Currently unavailable Score: 6.135 Category: Electronics Rating: 3.7 Votes: 32 Find similar products Deluxe Telescope Camera Adapter Kit for Nikon SLR / DSLR - 1.25 Variable Eyepiece Projection & Prime Focus. This Deluxe Adapter kit is used to connect Nikon DSLRs to most Telescopes accepting 1.25 Eyepieces. Included in this kit: Our Deluxe Variable Eyepiece Projection adapter , a Prime Focus adapter, a T-Ring to fit Nikon DSLRs, a Parfocalizing ring and basic setup instructions. The Variable feature lets you adjust the adapter length to vary the magnification (thus image size) for perfect framing of your shots. The Parfocalizing Ring lets you to match the focus of a spare eyepiece with your Camera setup for easier focusing. Fits most Plossl eyepieces up to 26mm FL (max 1.5 Upper Body Diameter). Fits all Nikon Film or Digital SLR Cameras including: D1, D2, D3, D3S, D3X, D35, D4, D40, D40X, D50, D60, D70, D80, D90, D100, D200, D300, D300S, D600, D700, D750, D800, D800E, D810, D3000, D3100, D3200, D5000, D5100, D5200, D7000, D7100, etc. Does not fit the small Nikon “1” Mirrorless cameras. IMPORTANT NOTES: Not intended for Spotting Scopes. This unit is for astronomical type telescopes that accept standardized 1.25 (lower barrel diameter) slip-in type eyepieces. Additional parts may be required depending on telescope type. Reflectors typically require a Barlow Lens to be placed between the adapter and focuser to extend the focus point. Refractors typically require you to replace the Diagonal with a slightly shorter extension tube to reach focus. This is true of ANY adapter. Most SCTs and Maks won't require anything else. Assembled unit with T-Ring weighs ~8.8oz (without eyepiece and camera). Pictures shown are representative of the product line. There may be small differences depending on the model of your camera or incremental improvements to the item. Not compatible with ETX 60/70/80 telescopes due to lack of back focus. Not recommended for Reflectors smaller than 4, Refractors smaller than 60mm or Catadioptrics smaller than 90mm.	B07V7B98DT Price: $69.99 Score: 6.135 Category: Electronics Rating: 4 Votes: 12 Find similar products Astromania 1.25 H-Alpha Night Sky Filter. The Night Sky Hydrogen-Alpha Filters are long-pass filters with a 50% transition from blocking to passing at about 640nm. At wavelengths longer than 650nm, transmittance is 80% or above. The filter is used as an extreme anti light-pollution filter, and for contrast-enhancement of emission nebulae and other astronomical objects bright in the infrared. The 1.25 Night Sky Hydrogen-Alpha Filter, threads into the nose-piece of industry-standard 1.25 Digital Imagers. The Astromania H-Alpha cut-off filter enhances the contrast between object and sky, allowing you to take good quality images even under urban skies.
B08FBFMWFL Price: $14.99 Score: 6.135 Category: Electronics Rating: 4 Votes: 8 Find similar products Optical Glass Cube Dichroic Beam Splitter Prism Ratio 50:50 Spectrome Sicence 20X20X20MM. 1. Material: H-K9L 2. Surface Quality: 40/20 3. Surface Flatness: N4@633nm 4. Beam Deviation: <3 arc min 5. Coating: Ts,p45+5% Rs,p45t5% Ts-Tpl<10%, Rs-Rp/<10% Absorption avgs10% AR Coating, Ravg<0.5% 6.Splitting Ratio:50:50 7.Broadband transparent 400nm-700nm 8.Size: 202020mm 9.Features: Polarization Beam Splitter-to split a beam into 2 beams with orthogonal polarization. Light-path reversed, PBS is always used to couple 2 beams with orthogonal polarization into one. 10.Package:1 pcs 202020mm.	B0018IOZDG Price: $79 Score: 5.988 Category: Electronics Rating: 5 Votes: 3 Find similar products Baader Planetarium Yellow 495nm Long-Pass Filter, 2 Eyepiece. The Baader Planetarium FCFY-2 Yellow Long-Pass Filter has a bandpass at 495 nm and is designed for 2 eyepieces. It has 98% transmission efficiency and is superb for bright planet and cometary details. It can be placed anywhere in the optical path without introducing astigmatism or other defects. Baader Planetarium astronomy filters by far supersede the mediocre quality of common flame polished color filters. A fine optical polish and 2 mm thick glass allows these filters to be inserted anywhere into the optical path without introducing astigmatism or other defects. For instance, they can be used in front of a binocular viewer without degrading the image in any way.Substrates are free of striae and plane-parallel polished to within 30 seconds of arc. This eliminates any double images or ghosting due to wedge errors in the glass. The filter cell features the largest clear aperture of any telescope filter on the market for complete freedom from vignetting at any focal length.The front crown incorporates milled notches, which makes handling and threading the filter an easy operation in the dark. All surfaces are treated with a 7-layer Multi-Coating, featuring a mere 0.25% residual reflection. It is the most elaborate coating ever applied onto amateur color filters, resulting in a filter free of any false reflections under any incident angle of light.Light is the hottest commodity for all planetary observation. Especially during high magnification wo.
B0085X0HM0 Availability: Currently unavailable Score: 5.988 Category: Electronics Rating: 3.8 Votes: 24 Find similar products Zacuto Z-Finder Pro 3.0X for 3.2 in. Screens. The Z-Finder Pro 3x for 3.2? screens is an optical viewfinder that allows DSLR cameras to have the correct form factor for video. This Z-finder will magnify the LCD screen by 3x and has a diopter for specific focus tuning. It cuts out any extraneous light and offers an initial point of stability by pressing your eye against our comfy, large eyecup. The Z-finder Pro 3x for 3.2? screens comes with a 40mm diameter Zacuto optical designed lens, anti-fog coated protective covers, and a mounting system designed for 3.2? LCD screens. The diopter allows you to dial in the focus to match your eye. If you need extra focal points you can use the included Z-Finder Extender Frames. These are semi-permanent stackable frames that attach to the body of the Z-Finder Pro and extend the Z-Finder glass further away from the LCD screen for people who are farsighted.	B08S75LLYL Price: $1220 Score: 5.988 Category: Electronics Rating: 5 Votes: 1 Find similar products Omegon Apochromatic Refractor Pro APO AP 72/400 Quintuplet OTA. Five lenses, double ED and a flat field of view to marvel at What is it that drives astrophotographers time and again? The desire to capture objects and the sky in high quality. With this apochromat, you can do just that. The specially selected ED glass and a colour-pure image result in observations displaying fine details that would not be possible with basic optics. Experience a new standard of quality for yourself. The highlights at a glance: - 72mm quintuplet ED Apo with five lenses, two of which are made of ED glass for an even more brilliant image - A two-lens integrated corrector ensures a flat and illuminated field, also suitable for full-frame cameras with an image circle of up to 44mm - 3 focuser with a 1:10 reduction ratio: Easily focus larger and heavier cameras with high precision - 140mm back focus - Camera rotates 360° so you can find the right orientation Why these optics reveal more details No more images without contrast. This apochromat shows what is really possible: pure-colour and high-contrast observations and astrophotos. The key is a sophisticated optical design with premium ED glass for a crystal-clear image. Compared to most mirror systems, the better-defined optics allow you to see more and finer details when observing the planets, for example. All surfaces of the lens elements are treated with an effective multi-coating to prevent reflections. Enjoy memorable observations and shots. Large focuser with gearing and ball bearings Full-frame enthusiasts need space: That is precisely what the geared focuser offers. It beautifully complements the premium o.
B01NAS5M87 Availability: Currently unavailable Score: 5.882 Category: Electronics Rating: 4.6 Votes: 2 Find similar products NiSi 100mm System V5-PRO Filter Holder Kit Second Generation (Starter Kit, Advance Kit,Professional Kit). NiSi 100mm System V5-PRO Filter Holder Kit Second Generation (Starter Kit, Advance Kit,Professional Kit) NiSi V5-PRO 100mm Filter Holder System Kit + PRO CPL(86mm) + 67,72,77,82mm Rings + Case Left-to-right pressed clips instead of the traditional top-to-bottom design better to protect the filters and more smooth. NiSi V5-PRO filter holder features an exclusive patented design that allows the Circular Polarizer filter to rotate independently via on the 82mm main adapter ring without disturbing other filters in use, meaning you no longer have to set your polarizer before inserting filters into the holder. NiSi Glass 100X150mm Filter adopt our exclusive Nano dual sided gradual Multi-coating, this means ultra violet to near-infrared light can pass through evenly, ensuring a perfectly neutral effect. NiSi filters are precision cut, polished and optically processed to allow for extreme flatness and high parallelism for the highest quality glass, image quality and image crispness. The Optical Nano Multi-Coating provides for a perfectly neutral filter that has no color shift or color cast. This optical Nano coating is also anti-glaring and anti-reflective, alleviating solar glare. This technology was developed for the NiSi IR ND exclusively by NiSi Filters. This is a breakthrough in the world of Digital Imaging. NiSi square IR ND filters are not only coated but we have also added a Japanese fire-proof foam gasket to ensure there is no light leakage. 100mm system ALL IN ONE case can hold V5 or V5 Pro holder system and 8pcs 100mm system filters,compatible with all other brands filters. All 100mm system filters compatible with Lee, Hitech, NiSi and Cokin 4x4 Holders.	B07XQXTG9Y Availability: Currently unavailable Score: 5.848 Category: Electronics Rating: 1 Votes: 1 Find similar products Omegon Apochromatic Refractor Pro APO AP 71/450 Quadruplet OTA. Better astrophotos that help you discover the sky in a new way. What is it that drives astrophotographers time and again? It is the fascination of depicting the sky in its most beautiful colours and shapes. With this apochromat, you can do just that. The premium ED glass and a colour-pure image make for enjoyable observations with fine details that would not be possible with basic optics. Rediscover the sky. Why these optics reveal more details No more images without contrast. This apochromat shows what is really possible: pure-colour and high-contrast observations and astrophotos. The key is a sophisticated optical design with premium ED glass for a crystal-clear image. Compared to most mirror systems, the better-defined optics allow you to see more and finer details when observing the planets, for example. All surfaces of the lens elements are treated with an effective multi-coating to prevent reflections. Enjoy memorable observations and shots. 2.5 focuser with gearing and ball bearings This 2.5 geared focuser is a small spatial miracle, and large enough that no shading occurs. An ingenious hybrid technology comprising a Crayford focuser and a gear wheel makes it particularly strong and suitable for accessories weighing up to 4kg. The ball bearings provide for smooth focusing, allowing you to easily find the perfect focus. A 1:10 reduction gearing makes precise focusing a breeze. Astrophotographers around the world value precisely these features. 360° rotation for framing the perfect photo. You found the object and focused on it, but with the wrong orientation? Save yourself the trouble of having to start over again at night to align an elongated object with the sensor. This is ea.