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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.

Products

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$141.00 - $141.00
$141.00
$141.00 - $141.00
$141.00

William Optics 243mm Saddle Handle Bar with 50mm Guiding Rings

WO-M-HC243BL-GR50IISL

Compatible with William Optics' slide-base guide rings Can be used to make William Optics telescopes portable Description The Wil...

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$141.00 - $141.00
$141.00
$141.00 - $141.00
$141.00
$59.00 - $59.00
$59.00
$59.00 - $59.00
$59.00

William Optics 2x Barlow Nosepiece for Binoviewer

WO-E-BINO-B2
7 in stock

2x magnification Barlow lens specifically designed for binoviewers Increases magnification while maintaining focus with binoviewer setups ...

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$59.00 - $59.00
$59.00
$59.00 - $59.00
$59.00
$228.00 - $228.00
$228.00
$228.00 - $228.00
$228.00

William Optics 3.5"-2" RotoLock Visual Back Adapter

Options available

3.5" to 2" RotoLock visual back adapter for secure accessory attachment Ensures a stable and precise connection for...

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$228.00 - $228.00
$228.00
$228.00 - $228.00
$228.00
$64.00 - $64.00
$64.00
$64.00 - $64.00
$64.00

William Optics 4" Extension Tube for FLT Series

WO-P-EXFLT

4" extension tube designed for William Optics FLT Series Provides additional back focus for various optical setups ...

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$64.00 - $64.00
$64.00
$64.00 - $64.00
$64.00
$110.00 - $110.00
$110.00
$110.00 - $110.00
$110.00

William Optics 45° Erecting Prism - 1.25"

WO-D-EP125
6 in stock

45-degree erecting prism for 1.25" telescope eyepieces Provides correct image orientation for terrestrial and astronomical viewing Des...

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$110.00 - $110.00
$110.00
$110.00 - $110.00
$110.00
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00

William Optics 48mm T-Mount for Canon

WO-TM-CN-EOS-M48
5 in stock

Allows for simple installation Made with improved CNC for greater rigidity Description Compatible with Canon EOS-R mount mirrorless cameras....

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$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00
$68.00 - $68.00
$68.00
$68.00 - $68.00
$68.00

William Optics 48mm T-Mount for Canon EOS R Mirrorless

WO-TM-CN-EOSR-M48
3 in stock

High-precision M48 T-Mount Adapter For Canon EOS R mirrorless DSLR cameras Description The William Optics 48mm T-Mount for Canon ...

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$68.00 - $68.00
$68.00
$68.00 - $68.00
$68.00
$55.00 - $55.00
$55.00
$55.00 - $55.00
$55.00

William Optics 48mm T-Mount for Fuji FX - Black

WO-TM-FJ-X-M48
1 in stock

High-precision M48 T-Mount Adapter For Fuji FX series cameras Description The William Optics 48mm T-Mount for Pentax K is a high-...

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$55.00 - $55.00
$55.00
$55.00 - $55.00
$55.00
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00

William Optics 48mm T-Mount for Nikon F

WO-TM-NK-F-M48
2 in stock

48mm T-Mount designed for Nikon F-mount cameras Ensures a secure and precise connection between your camera and tel...

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$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00
$68.00 - $68.00
$68.00
$68.00 - $68.00
$68.00

William Optics 48mm T-Mount for Nikon Z

WO-TM-NK-Z-M48
1 in stock

High-precision M48 T-Mount Adapter For Canon EOS R mirrorless DSLR cameras Description The William Optics 48mm T-Mount for Canon ...

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$68.00 - $68.00
$68.00
$68.00 - $68.00
$68.00
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00

William Optics 48mm T-Mount for Pentax K - Black

WO-TM-PT-K-M48
1 in stock

High-precision M48 T-Mount Adapter For Pentax K series cameras Description The William Optics 48mm T-Mount for Pentax K is a high...

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$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00
$55.00 - $55.00
$55.00
$55.00 - $55.00
$55.00

William Optics 48mm T-Mount for Sony E - Black

WO-TM-SN-E-M48
4 in stock

48mm T-Mount designed specifically for Sony E-mount cameras Allows seamless connection between your Sony E-mount ca...

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$55.00 - $55.00
$55.00
$55.00 - $55.00
$55.00
$148.00 - $178.00
$148.00 - $178.00
$148.00 - $178.00
$148.00

William Optics 50mm Guiding Scope

Options available
1 variants in stock

Make it easier to find and track guide stars User-friendly and can be set up quickly Description The William Optics 50mm Guiding ...

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$148.00 - $178.00
$148.00 - $178.00
$148.00 - $178.00
$148.00
$59.00 - $59.00
$59.00
$59.00 - $59.00
$59.00

William Optics 75mm -110mm Bahtinov Focusing Mask

WO-BM-DS-GR45

Precise focusing aid for telescopes with apertures between 75mm and 110mm Adjustable design to fit various telescope sizes within the specif...

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$59.00 - $59.00
$59.00
$59.00 - $59.00
$59.00
$116.00 - $116.00
$116.00
$116.00 - $116.00
$116.00

William Optics 90° Erect Prism - 1.25"

WO-D-EP90-125II
6 in stock

90-degree erecting prism for 1.25" telescope eyepieces Provides correct image orientation for terrestrial and astronomical viewing Des...

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$116.00 - $116.00
$116.00
$116.00 - $116.00
$116.00
$138.00 - $138.00
$138.00
$138.00 - $138.00
$138.00

William Optics 99% Dielectric Dura Bright Diagonal - 1.25"

WO-D-125D-C-DB
1 in stock

High-quality 1.25" diagonal for refractor and catadioptric telescopes 99% reflectivity dielectric coating for maximum light transmission ...

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$138.00 - $138.00
$138.00
$138.00 - $138.00
$138.00
$158.00 - $158.00
$158.00
$158.00 - $158.00
$158.00

William Optics 99% Dielectric Dura Bright Diagonal - 2"

WO-D-DIG2D-C-DB-T
4 in stock

High-quality 2" diagonal for refractor and catadioptric telescopes 99% reflectivity dielectric coating for maximum light transmission ...

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$158.00 - $158.00
$158.00
$158.00 - $158.00
$158.00
$278.00 - $278.00
$278.00
$278.00 - $278.00
$278.00

William Optics Adjustable Flat61 for Z61

WO-P-FLAT61A
1 in stock

Adjustable field flattener specifically designed for the William Optics Z61 telescope Improves edge-to-edge sharpness for astrophotography w...

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$278.00 - $278.00
$278.00
$278.00 - $278.00
$278.00
$269.00 - $269.00
$269.00
$269.00 - $269.00
$269.00

William Optics Adjustable Flat6AIII

WO-P-FLAT6AIII
2 in stock

Versatile field flattener for William Optics refractor telescopes Adjustable design for optimal performance with various camera setups ...

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$269.00 - $269.00
$269.00
$269.00 - $269.00
$269.00
$348.00 - $348.00
$348.00
$348.00 - $348.00
$348.00

William Optics Adjustable Flat6AIII for FLT91

WO-P-FLAT6AIII-M92

0.8x reducer For William Optics FLT91 refractor Description The William Optics Adjustable Flat6AIII for FLT91 is a special editio...

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$348.00 - $348.00
$348.00
$348.00 - $348.00
$348.00
$278.00 - $278.00
$278.00
$278.00 - $278.00
$278.00

William Optics Adjustable Flat73A for Z73

WO-P-FLAT73A
1 in stock

Improves edge-to-edge sharpness for astrophotography 43mm image circle Adjustable design 66.2mm back focus Description Specifications In the Bo...

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$278.00 - $278.00
$278.00
$278.00 - $278.00
$278.00
$284.00 - $284.00
$284.00
$284.00 - $284.00
$284.00

William Optics Adjustable Reducer Flattener Flat61R for Z61

WO-P-FLAT61R

Adjustable reducer and field flattener for William Optics Z61 telescope Improves image sharpness and reduces distortion Description ...

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$284.00 - $284.00
$284.00
$284.00 - $284.00
$284.00
$284.00 - $284.00
$284.00
$284.00 - $284.00
$284.00

William Optics Adjustable Reducer Flattener Flat73R for Z73

WO-P-FLAT73R

Adjustable reducer and field flattener for William Optics Z73 telescope Improves image sharpness and reduces distortion Description ...

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$284.00 - $284.00
$284.00
$284.00 - $284.00
$284.00
$102.00 - $118.00
$102.00 - $118.00
$102.00 - $118.00
$102.00

William Optics Bahtinov Mask Cover for GT71 / Z73 / Star71II

Options available

Bahtinov mask cover for William Optics GT71, Z73, and Star71II telescopes Enhances focusing accuracy for astrophotography Description ...

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$102.00 - $118.00
$102.00 - $118.00
$102.00 - $118.00
$102.00