William Optics

William Optics RedCat 51 250mm f/4.9 Gen 1.5 APO Telephoto Lens

$1,062.00

Note: The RedCat was upgraded in late 2019 with exciting new features! In a nutshell: Now includes a tiltable rear plate for precise squaring of the camera sensor Installing a 48mm filter now involves simply un-threading the camera mounting ring--no tools required! The mounting ring has its accessory mounting surface...

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William Optics

*New* William Optics Cat Series Saddle Handlebar (Titanium Grey)

$60.00

With the introduction of the improved RedCat 51 (and its sibling, SpaceCat 51) comes a new mounting saddle for finder, guidescope, etc., that doubles as a carrying handle.The titanium grey version matches that of the SpaceCat 51. (Available also in red for the RedCat, and basic black for any color...

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William Optics

William Optics Z61 Zenithstar 61mm f/5.9 Apochromat Refractor OTA (Blue)

$770.00

The new Zenithstar 61 is the most compact telescope thus far offered by William optics. But this does not detract from its versatility. The short focal length delivers wide visual fields and almost panoramic deep-sky astro-images. At the same time the Ohara FPL-53 objective yields excellent control of false color...

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William Optics

William Optics Z73 Mk II Zenithstar 73mm f/5.9 Apochromat Refractor OTA (Red)

$926.00

The new William Optics Zenithstar 73, at a stowed length of just 310mm, is a very compact telescope, and thus suited to travel where bulk and weight are considerations. Its diminutive size does not detract from its versatility. The short focal length delivers wide visual fields and deep-sky astro-images. At...

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William Optics

William Optics Z73 Mk II Zenithstar 73mm f/5.9 Apochromat Refractor OTA (Blue)

$926.00

The new William Optics Zenithstar 73, at a stowed length of just 310mm, is a very compact telescope, and thus suited to travel where bulk and weight are considerations. Its diminutive size does not detract from its versatility. The short focal length delivers wide visual fields and deep-sky astro-images. At...

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William Optics

William Optics Z81 Zenithstar 81mm f/6.9 Apochromat Refractor OTA (Red)

$1,079.99

The new William Optics Zenithstar 81, at a stowed length of 460mm (18.1"), is a reasonably compact telescope, and thus suited to travel where bulk and weight are considerations. Its comparatively small size does not detract from its versatility. The short focal length delivers wide visual fields and deep-sky astro-images....

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William Optics

William Optics FLT132 Mk III Fluorostar 132mm f/7 Apochromat Refractor OTA (Blue)

$6,339.99

The William Optics Fluorostar 132. Simply put, a joy to use. You will be astonished by the stunning resolution for both visual and imaging work. And at a rather fast f/7. Until today this was only a dream at this price!Features a top-quality triplet, air-spaced objective, based around an FPL-53...

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William Optics

William Optics Z103 Zenithstar 103mm f/6.9 Apochromat Refractor OTA (Blue)

$1,749.99

The new William Optics Zenithstar 103, at a stowed length of just 615mm, is a quite compact telescope, and thus suited to travel where bulk and weight are considerations. Some airlines may permit its being carried into the cabin. The relatively short focal length, particularly in conjunction with the optional...

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William Optics

William Optics Z73 Mk II Zenithstar 73mm f/5.9 Apochromat Refractor OTA (Gold)

$926.00

The new William Optics Zenithstar 73, at a stowed length of just 310mm, is a very compact telescope, and thus suited to travel where bulk and weight are considerations. Its diminutive size does not detract from its versatility. The short focal length delivers wide visual fields and deep-sky astro-images. At...

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William Optics

William Optics GT81 Mk III Gran Turismo 81mm f/5.9 Apochromat Refractor OTA (Blue)

$1,889.99

The new GT81 three-element super APO offer superb quality for imaging and visual use at an affordable price. The pristine white finish and the elegant blue trim embodies more than just good looks.Features Triplet air-spaced objective (FPL-53) in adjustable CNC machined ultra high precision lens cell Extremely sharp Excellent color...

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William Optics

William Optics Z81 Zenithstar 81mm f/6.9 Apochromat Refractor OTA (Gold)

$1,079.99

The new William Optics Zenithstar 81, at a stowed length of 460mm (18.1"), is a reasonably compact telescope, and thus suited to travel where bulk and weight are considerations. Its comparatively small size does not detract from its versatility. The short focal length delivers wide visual fields and deep-sky astro-images....

View product

William Optics

William Optics Z81 Zenithstar 81mm f/6.9 Apochromat Refractor OTA (Blue)

$1,079.99

The new William Optics Zenithstar 81, at a stowed length of 460mm (18.1"), is a reasonably compact telescope, and thus suited to travel where bulk and weight are considerations. Its comparatively small size does not detract from its versatility. The short focal length delivers wide visual fields and deep-sky astro-images....

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William Optics

William Optics GT153 Gran Turismo 153mm f/7.8 Apochromat Refractor OTA (Gold)

$8,099.99

Note: The 50mm guide scope shown here is NOT included.The William Optics Gran Turismo 153; a 6" triplet APO at an affordable price. You will be astonished by the stunning resolution for both visual and imaging work. And at a reasonably fast f/7.8. Until today this was only a dream...

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William Optics

William Optics GT153 Gran Turismo 153mm f/7.8 Apochromat Refractor OTA (Red)

$8,099.99

Note: The 50mm guide scope shown here is NOT included.The William Optics Gran Turismo 153; a 6" triplet APO at an affordable price. You will be astonished by the stunning resolution for both visual and imaging work. And at a reasonably fast f/7.8. Until today this was only a dream...

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William Optics

William Optics GT153 Gran Turismo 153mm f/7.8 Apochromat Refractor OTA (Blue)

$8,099.99

Note: The 50mm guide scope shown here is NOT included.The William Optics Gran Turismo 153; a 6" triplet APO at an affordable price. You will be astonished by the stunning resolution for both visual and imaging work. And at a reasonably fast f/7.8. Until today this was only a dream...

View product

William Optics

William Optics FLT132 Mk III Fluorostar 132mm f/7 Apochromat Refractor OTA (Gold)

$6,339.99

The William Optics Fluorostar 132. Simply put, a joy to use. You will be astonished by the stunning resolution for both visual and imaging work. And at a rather fast f/7. Until today this was only a dream at this price!Features a top-quality triplet, air-spaced objective, based around an FPL-53...

View product

William Optics

William Optics FLT132 Mk III Fluorostar 132mm f/7 Apochromat Refractor OTA (Red)

$6,339.99

The William Optics Fluorostar 132. Simply put, a joy to use. You will be astonished by the stunning resolution for both visual and imaging work. And at a rather fast f/7. Until today this was only a dream at this price!Features a top-quality triplet, air-spaced objective, based around an FPL-53...

View product

William Optics

William Optics Z126 Mk II Zenithstar 126mm f/7.7 Apochromat Refractor OTA (Gold)

$2,969.99

The new William Optics Zenithstar 126, at a stowed length of 970mm, is a reasonably compact telescope for its aperture. The relatively short focal length, particularly in conjunction with the optional 0.8X focal reducer (yielding f/6.2), delivers wide visual fields and deep-sky astro-images. At the same time the Ohara FPL-53...

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William Optics

William Optics Z126 Mk II Zenithstar 126mm f/7.7 Apochromat Refractor OTA (Red)

$2,969.99

The new William Optics Zenithstar 126, at a stowed length of 970mm, is a reasonably compact telescope for its aperture. The relatively short focal length, particularly in conjunction with the optional 0.8X focal reducer (yielding f/6.2), delivers wide visual fields and deep-sky astro-images. At the same time the Ohara FPL-53...

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William Optics

William Optics Z126 Mk II Zenithstar 126mm f/7.7 Apochromat Refractor OTA (Blue)

$2,969.99

The new William Optics Zenithstar 126, at a stowed length of 970mm, is a reasonably compact telescope for its aperture. The relatively short focal length, particularly in conjunction with the optional 0.8X focal reducer (yielding f/6.2), delivers wide visual fields and deep-sky astro-images. At the same time the Ohara FPL-53...

View product

William Optics

William Optics Z103 Zenithstar 103mm f/6.9 Apochromat Refractor OTA (Gold)

$1,749.99

The new William Optics Zenithstar 103, at a stowed length of just 615mm, is a quite compact telescope, and thus suited to travel where bulk and weight are considerations. Some airlines may permit its being carried into the cabin. The relatively short focal length, particularly in conjunction with the optional...

View product

William Optics

William Optics Z103 Zenithstar 103mm f/6.9 Apochromat Refractor OTA (Red)

$1,749.99

The new William Optics Zenithstar 103, at a stowed length of just 615mm, is a quite compact telescope, and thus suited to travel where bulk and weight are considerations. Some airlines may permit its being carried into the cabin. The relatively short focal length, particularly in conjunction with the optional...

View product

William Optics

William Optics GT81 Mk III Gran Turismo 81mm f/5.9 Apochromat Refractor OTA (Gold)

$1,889.99

The new GT81 three-element super APO offer superb quality for imaging and visual use at an affordable price. The pristine white finish and the elegant gold trim embodies more than just good looks.Features Triplet air-spaced objective (FPL-53) in adjustable CNC machined ultra high precision lens cell Extremely sharp Excellent color...

View product

William Optics

William Optics Z61 Zenithstar 61mm f/5.9 Apochromat Refractor OTA (Gold)

$770.00

The new Zenithstar 61 is the most compact telescope thus far offered by William optics. But this does not detract from its versatility. The short focal length delivers wide visual fields and almost panoramic deep-sky astro-images. At the same time the Ohara FPL-53 objective yields excellent control of false color...

View product

William Optics

William Optics Z61 Zenithstar 61mm f/5.9 Apochromat Refractor OTA (Red)

$770.00

The new Zenithstar 61 is the most compact telescope thus far offered by William optics. But this does not detract from its versatility. The short focal length delivers wide visual fields and almost panoramic deep-sky astro-images. At the same time the Ohara FPL-53 objective yields excellent control of false color...

View product

William Optics

William Optics GT71 Mk II Gran Turismo 71mm f/5.9 Apochromat Refractor OTA (Gold)

$1,139.99

NOTE: The guide scope rings shown here are optional items.The new GT71 three-element super APO offer superb quality for imaging and visual use at an affordable price! From the pristine white finish on the CNC to the elegant gold trim which has more than just good looks. And it goes...

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William Optics

William Optics GT81 Mk III Gran Turismo 81mm f/5.9 Apochromat Refractor OTA (Red)

$1,889.99

The new GT81 three-element super APO offer superb quality for imaging and visual use at an affordable price. The pristine white finish and the elegant red trim embodies more than just good looks.Features Triplet air-spaced objective (FPL-53) in adjustable CNC machined ultra high precision lens cell Extremely sharp Excellent color...

View product