List of products by brand William Optics

William Optics Flat6A III Special Edition FLT91(73852)
William Optics Flat6A III Special Edition FLT91(73852)
3493.21 kr
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A field flattener is a lens that corrects the natural field curvature created by a telescope's primary optics. Without this correction, stars near the edge of your image may appear less sharp. The flattener is placed between the telescope and the camera, allowing astrophotographers to capture images with consistently sharp stars across the entire field. This particular field flattener is specially designed for the William Optics Fluorostar FLT 91. 
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William Optics Guidescope 50mm f/4.0 RotoLock (82921)
William Optics Guidescope 50mm f/4.0 RotoLock (82921)
2205.04 kr
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This guidescope is designed to be mounted parallel to your main telescope tube, ideally using guide scope rings for easy adjustment and alignment. A compatible camera can be attached to the end of the guidescope to control the mount's tracking, enabling accurate long-exposure night sky photography. Cameras suitable for guiding typically use a 1.25" socket, allowing for a straightforward connection to the guidescope.
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William Optics Guidescope 50mm (69410)
William Optics Guidescope 50mm (69410)
2030.42 kr
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This guidescope is mounted parallel to the main telescope tube, ideally using guide scope rings for easy positioning and adjustment. You can attach a compatible camera to the end of the guidescope to enable automated tracking, which is essential for long-exposure astrophotography. Guiding cameras usually have a 1.25" socket for straightforward connection to the guidescope.
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William Optics Red dot finder with quick-release bracket and base (4704)
William Optics Red dot finder with quick-release bracket and base (4704)
1154.46 kr
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This practical Red Dot Finder is supplied with a convenient T-bracket, making it easy to mount on William Optics telescopes, including the ZS66 and ZS80 models. Finding objects in the night sky is simple with this finder. Look through the finder with one eye while keeping the other eye open, and you'll see one of four selectable shapes projected by the LEDs onto the sky, helping you easily align your telescope.
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William Optics Tube clamps 90mm (4697)
William Optics Tube clamps 90mm (4697)
1746.56 kr
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These 90mm mounting rings are constructed from solid aluminium and feature a powder-coated finish. The interior is lined with felt, making them compatible with most tubes of similar outer diameter and all William Optics 80mm telescopes, including all Megrez 80 and Zenith Star 80 models. This is a valuable accessory for anyone looking to maximize the performance and versatility of their telescope mount.
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William Optics Losmandy Swan Series 400mm red (70815)
William Optics Losmandy Swan Series 400mm red (70815)
1746.56 kr
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Prism rails, also known as dovetail bars, are primarily used to attach telescopes to astronomical mounts. These rails can also serve as mounting points for additional accessories on the telescope tube, such as a camera or internal expansion joint. In astronomy, there are two main standards for these rails. The first is the narrower design introduced by Vixen, a Japanese manufacturer. The second is the wider Losmandy standard, which is 3 inches wide and designed for heavier optical equipment.
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William Optics Losmandy Swan Series 400mm gray (70817)
William Optics Losmandy Swan Series 400mm gray (70817)
1794.83 kr
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Prism rails, also known as dovetail bars, are primarily used for mounting telescopes onto astronomical mounts. They are also commonly used to attach additional accessories to the telescope tube, such as an internal expansion joint or a camera. There are two main standards for these rails in astronomy. The first is the narrow rail standard developed by the Japanese manufacturer Vixen. The second is the wider Losmandy standard, which measures 3 inches across and is typically used for heavier optical equipment
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William Optics Vixen-Style 290mm Prism Rail red (71285)
William Optics Vixen-Style 290mm Prism Rail red (71285)
1343.8 kr
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Prism rails, also known as dovetail bars, are mainly used to mount telescopes onto astronomical mounts. They can also be used to attach additional accessories to the telescope tube, such as a camera or an internal expansion joint. There are two main standards for these rails in astronomy. The first is the narrower Vixen standard, created by the Japanese manufacturer Vixen. The second is the wider Losmandy standard, which is 3 inches wide and intended for heavier optical equipment.
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William Optics Rotator M92 (69534)
William Optics Rotator M92 (69534)
2379.75 kr
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A rotating adapter allows you to attach a camera or other accessories to your telescope and rotate them around the optical axis. This makes it possible to choose the ideal sensor rotation angle for each target when doing astrophotography. This is a newly designed 3-inch camera angle rotator from William Optics. It is compatible with all William Optics focusers and other brands that use M92 and M83 threads.
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William Optics rotator Rotolock Visual Back 3.5 red (70122)
William Optics rotator Rotolock Visual Back 3.5 red (70122)
2663.61 kr
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This high-quality adapter is designed for the 3.5-inch focusers on large FLT refractors from William Optics. It functions as a visual back and operates using the "Twist-Lock" or "ClickLock" clamping system. By turning the locking ring, eyepieces and accessories are held securely in place without any risk of tilting. The Rotolock adapter screws directly onto the 3.5-inch extension tube of the FluoroStar refractor using a threaded connection. On the eyepiece side, it provides a standard 2-inch opening.
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William Optics rotator Rotolock Visual Back 3.5 blue (70123)
William Optics rotator Rotolock Visual Back 3.5 blue (70123)
2663.61 kr
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This high-quality adapter is designed for the 3.5-inch focusers used on large FLT refractors from William Optics. It acts as a visual back and uses the "Twist-Lock" or "ClickLock" clamping method. By turning the locking ring, eyepieces and accessories are held securely and gently, preventing any tilting. The Rotolock is screwed directly onto the 3.5-inch extension tube of the FluoroStar refractor using a threaded connection. The eyepiece side provides a standard 2-inch opening.
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William Optics rotator Rotolock Visual Back 3.5 gold (70124)
William Optics rotator Rotolock Visual Back 3.5 gold (70124)
2663.61 kr
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This premium adapter is made for the 3.5-inch focusers found on large FLT refractors from William Optics. It functions as a visual back and utilizes the well-known "Twist-Lock" or "ClickLock" system, allowing eyepieces and accessories to be clamped firmly and gently with a simple turn—eliminating any risk of tilting. The Rotolock screws directly onto the 3.5-inch extension tube of the FluoroStar refractor using a threaded connection. On the eyepiece side, a standard 2-inch opening is provided.
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William Optics Apochromatic refractor AP 81/478 Gran Turismo 81 IV OTA silver (67476)
William Optics Apochromatic refractor AP 81/478 Gran Turismo 81 IV OTA silver (67476)
12141.9 kr
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The Gran Turismo refractor is an advanced apochromatic triplet telescope featuring an FPL-53 glass element for exceptional color correction, superior contrast, and sharp, high-resolution images. It is a versatile telescope that performs equally well for both visual observation and astrophotography, offering outstanding optical performance in a compact, travel-friendly design. When equipped with an optional zenith mirror, the Gran Turismo delivers high-contrast views of the Moon and planets with remarkable color accuracy and detail.
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William Optics Apochromatic refractor AP 51/250 SpaceCat WIFD OTA (83498)
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William Optics Apochromatic refractor AP 51/250 SpaceCat WIFD OTA (83498)
8981.77 kr
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The AP 51/250 SpaceCat is a compact and highly refined apochromatic refractor designed primarily for astrophotographers who demand portability without compromising image quality. Despite its small size, it delivers outstanding optical performance and is also suitable for creative nature photography. Its advanced Petzval optical design ensures a flat, well-corrected image field, making it an excellent choice for modern full-frame cameras. With its fast focal ratio of f/4.9, it enables short exposure times and efficient light capture.
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William Optics Apochromatic refractor Pleiades 181 AP 181/998 Astrograph OTA (84720)
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William Optics Apochromatic refractor Pleiades 181 AP 181/998 Astrograph OTA (84720)
183323.43 kr
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The Pleiades 181 is a high-performance astrograph developed almost exclusively for serious astrophotography. Featuring premium OHARA FPL-53 glass and an integrated field corrector, this telescope delivers outstanding image sharpness and color accuracy across a fully corrected 55 mm image circle. With its fast f/5.5 focal ratio, it enables shorter exposure times while fully illuminating full-frame sensors. The elegant white and red design is inspired by the Pleiades star cluster, combining visual appeal with professional functionality.
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William Optics Apochromatic refractor AP 56/269 UltraCat 56 WIFD (88286)
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William Optics Apochromatic refractor AP 56/269 UltraCat 56 WIFD (88286)
13714.51 kr
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The UltraCat 56 is a compact, high-performance 56 mm apochromatic refractor developed for astrophotographers who require outstanding sharpness and true color reproduction. Despite its small size, it delivers professional-level optical performance for wide-field imaging. The telescope features an advanced 5-element Petzval optical design incorporating Super ED and lanthanum glass. With a fast focal ratio of f/4.8, it produces exceptionally sharp, flat-field images across a fully corrected 50 mm image circle.
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William Optics Apochromatic refractor AP 76/365 UltraCat 76 WIFD (87765)
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William Optics Apochromatic refractor AP 76/365 UltraCat 76 WIFD (87765)
21116.03 kr
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The UltraCat 76 is a premium 76 mm apochromatic refractor developed for astrophotographers who demand outstanding image sharpness and accurate color reproduction. It combines advanced optical engineering with a compact and robust design, making it ideal for wide-field imaging. Featuring a sophisticated 5-element Petzval optical system with Super ED and lanthanum glass, the telescope achieves exceptional correction of chromatic aberration. With its fast focal ratio of f/4.8, it delivers bright, sharp, and flat-field images across a fully corrected 50 mm image circle.
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William Optics Apochromatic refractor AP 91/448 GreyCat 91 WIFD OTA (88166)
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William Optics Apochromatic refractor AP 91/448 GreyCat 91 WIFD OTA (88166)
29388.24 kr
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The AP 91/448 GreyCat 91 combines compact dimensions, an attractive price, and excellent optical performance. It is designed for both astrophotographers and nature photographers who require high image quality and reliable construction. The optical system is based on a Petzval design with four elements arranged in three groups, using high-quality FPL53 and FPL51 glass. This configuration produces a color-accurate, fully corrected image field with a diameter of over 55 mm, making it suitable for full-frame cameras. The fast focal ratio of f/4.9 enables shorter exposure times and efficient light gathering.
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William Optics Apochromatic refractor AP 81/478 Gran Turismo 81 IV OTA Guidescope-Set (69218)
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William Optics Apochromatic refractor AP 81/478 Gran Turismo 81 IV OTA Guidescope-Set (69218)
16326.8 kr
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This set includes the William Optics AP 81/478 Gran Turismo 81 IV optical tube assembly and the William Optics UniGuide 50 mm guidescope in red. The Gran Turismo 81 IV is an apochromatic triplet refractor featuring an FPL-53 element for outstanding color correction and high contrast performance. It is a versatile instrument designed for both visual observation and astrophotography. For visual use, the telescope can be combined with an optional zenith mirror to provide high-contrast views of the Moon and planets.
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