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June 24th: Store is closed for Quebec National Holiday. Orders placed that day will ship on June 25th.
June 24th: Store is closed for Quebec National Holiday. Orders placed that day will ship on June 25th.
Refractors

Refractors

Our selection of refractor telescopes covers the needs of serious observers and astrophotographers, from reliable beginner doublets to premium apochromatic refractor telescopes designed for demanding imaging setups. Thanks to their unobstructed optical design, refractors deliver exceptional contrast, pinpoint stars, and stable performance for both visual observation and deep-sky astrophotography.

  • Doublet & APO Triplet: Versatile wide-field refractors and fully color-corrected apochromatic objectives designed for high contrast, minimal chromatic aberration, and excellent performance as a refractor telescope for astrophotography.
  • Quadruplet, Quintuplet & Petzval: Advanced astrographs with integrated field correction, producing a flat imaging plane for modern large-format sensors without the need for external field flatteners.

We ship across Canada, the USA, and internationally, with knowledgeable support from passionate astronomers.

Filters

$398.00 - $438.00
$398.00 - $438.00
$398.00 - $438.00
$398.00

William Optics GuideStar 61

Options available

61mm aperture apochromatic refractor telescope Versatile instrument for both guiding and wide-field astrophotography Description ...

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$398.00 - $438.00
$398.00 - $438.00
$398.00 - $438.00
$398.00
$988.00 - $988.00
$988.00
$988.00 - $988.00
$988.00

William Optics MiniCat 51 WIFD f/3.5

WO-T-C-MINI-RD
5 in stock

The MiniCat51 is a versatile and powerful option for astrophotography enthusiasts, offering superior optics in a sleek, portable design. Its WIFD ...

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$988.00 - $988.00
$988.00
$988.00 - $988.00
$988.00
$4,198.00 - $4,198.00
$4,198.00
$4,198.00 - $4,198.00
$4,198.00

William Optics Pleiades 111 Astrograph F/4.8 7-element WIFD

WO-T-P-111BU

7-Element APO Refractor Design F/4.8 Fast Focal Ratio Wide Image Field Design (WIFD) Portable and Versatile Description Specifications I...

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$4,198.00 - $4,198.00
$4,198.00
$4,198.00 - $4,198.00
$4,198.00
$19,998.00 - $19,998.00
$19,998.00
$19,998.00 - $19,998.00
$19,998.00

William Optics Pleiades 181 Astrograph F/5.5 7-element with 3 ED glasses

WO-T-P-181RD

7-Element APO with 3 ED Glasses Refractor Design F/5.5 Fast Focal Ratio Portable and Versatile Description Specifications In the Box ...

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$19,998.00 - $19,998.00
$19,998.00
$19,998.00 - $19,998.00
$19,998.00
$2,198.00 - $2,198.00
$2,198.00
$2,198.00 - $2,198.00
$2,198.00

William Optics Pleiades 68 Astrograph F/3.8 7-Element WIFD

WO-T-P-68BU

7-Element APO Refractor Design F/3.8 Fast Focal Ratio WO Internal Focuser Design (WIFD) Portable and Versatile Description Specifications In th...

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$2,198.00 - $2,198.00
$2,198.00
$2,198.00 - $2,198.00
$2,198.00
$888.00 - $888.00
$888.00
$888.00 - $888.00
$888.00

William Optics Redcat 51 WIFD

WO-L-RC51RDIII
1 in stock

51mm 4-elements Petzval refractor 250mm focal length - f/4.9 focal ratio 48mm image circle - No field flattener required! WIFD focuser design D...

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$888.00 - $888.00
$888.00
$888.00 - $888.00
$888.00
$1,098.00 - $1,098.00
$1,098.00
$1,098.00 - $1,098.00
$1,098.00

William Optics RedCat 61 WIFD

WO-L-RC61
2 in stock

51mm 4-elements Petzval refractor 300mm focal length - f/4.9 focal ratio 46mm image circle - No field flattener required WIFD focuser design ...

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$1,098.00 - $1,098.00
$1,098.00
$1,098.00 - $1,098.00
$1,098.00
$1,398.00 - $1,398.00
$1,398.00
$1,398.00 - $1,398.00
$1,398.00

William Optics Redcat 71 WIFD

WO-T-C-71RDII
3 in stock

71mm APO F/4.9 Fast Focal Ratio Portable and Versatile Description Specifications In the Box Unleash your passion for astrophotography with ...

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$1,398.00 - $1,398.00
$1,398.00
$1,398.00 - $1,398.00
$1,398.00
$3,998.00 - $3,998.00
$3,998.00
$3,998.00 - $3,998.00
$3,998.00

William Optics UltraCat 108 f/4.8 WIFD

WO-T-C-108BR
1 in stock

$3,998.00 - $3,998.00
$3,998.00
$3,998.00 - $3,998.00
$3,998.00
$1,398.00 - $1,398.00
$1,398.00
$1,398.00 - $1,398.00
$1,398.00

William Optics UltraCat 56 f/4.8 WIFD

WO-T-C-56BR
2 in stock

$1,398.00 - $1,398.00
$1,398.00
$1,398.00 - $1,398.00
$1,398.00
$2,198.00 - $2,198.00
$2,198.00
$2,198.00 - $2,198.00
$2,198.00

William Optics UltraCat 76 f/4.8 WIFD

WO-T-C-76BR
2 in stock

$2,198.00 - $2,198.00
$2,198.00
$2,198.00 - $2,198.00
$2,198.00
$676.03 - $697.00
$676.03 - $697.00
$676.03 - $697.00
$676.03

William Optics Zenithstar 61II APO

Options available

61mm APO using FPL-53 Glass F/5.9 Fast Focal Ratio Portable and Versatile Description Specifications In the Box Unleash your passion for ast...

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$676.03 - $697.00
$676.03 - $697.00
$676.03 - $697.00
$676.03
$999.00 - $1,098.00
$999.00 - $1,098.00
$999.00 - $1,098.00
$999.00

William Optics Zenithstar 81 WIFD Telescope

Options available

$999.00 - $1,098.00
$999.00 - $1,098.00
$999.00 - $1,098.00
$999.00
$1,499.00 - $1,499.00
$1,499.00
$1,499.00 - $1,499.00
$1,499.00

ZWO FF110-APO 110mm Quadruplet Refractor F/7.0

ZWO-FF110-APO

90mm Aperture 766mm Focal Length (f/7) 4-Element Apochromatic Optics Integrated Field Flattener 3-inch Dual-Speed Focuser 14.9 lb. Optical Tube We...

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$1,499.00 - $1,499.00
$1,499.00
$1,499.00 - $1,499.00
$1,499.00
$1,999.00 - $1,999.00
$1,999.00
$1,999.00 - $1,999.00
$1,999.00

ZWO FF131-APO 131mm Quadruplet Refractor F/7.5

ZWO-FF131-APO

131mm Aperture 983mm Focal Length (f/7.5) 4-Element Petzval Optical Design 3-inch Dual-Speed Rack & Pinion Focuser 20.7 lb. Optical Tube Assem...

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$1,999.00 - $1,999.00
$1,999.00
$1,999.00 - $1,999.00
$1,999.00
$599.00 - $599.00
$599.00
$599.00 - $599.00
$599.00

ZWO FF70-APO 70mm Quadruplet Refractor F/7.0

ZWO-FF70-APO

70mm Aperture 490mm Focal Length (f/7) 4-Element Quadruplet Optical Design Integrated Field Flattener 2.4" Dual-Speed Rack & Pinion Focuser 6....

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$599.00 - $599.00
$599.00
$599.00 - $599.00
$599.00
$999.00 - $999.00
$999.00
$999.00 - $999.00
$999.00

ZWO FF90-APO 90mm Quadruplet Refractor F/6.8

ZWO-FF90-APO

90mm Aperture 609mm Focal Length (f/6.8) 4-Element Quadruplet Optical Design 3" Dual-Speed Rack & Pinion Focuser 9.97 lb. Optical Tube Assembl...

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$999.00 - $999.00
$999.00
$999.00 - $999.00
$999.00