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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.

Apochromatic Refractors

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$888.00 - $888.00
$888.00
$888.00 - $888.00
$888.00

William Optics Redcat 51 WIFD

WO-L-RC51RDIII
2 in stock

Compact Apochromatic Refractor Petzval-like Optical Design for Flat Fields William Optics Internal Focus Design (WIFD) CNC-Machined Aluminum Body ...

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$888.00 - $888.00
$888.00
$888.00 - $888.00
$888.00
$1,199.00 - $1,199.00
$1,199.00
$1,199.00 - $1,199.00
$1,199.00

Askar FRA400 72mm f/5.6 Quintuplet APO

ASK-FRA400
2 in stock

72mm Aperture Quintuplet APO Lens 400mm Focal Length at f/5.6 44mm Full-Frame Image Circle 140mm Available Back Focus 3" Rack-and-Pinion Focuser w...

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$1,199.00 - $1,199.00
$1,199.00
$1,199.00 - $1,199.00
$1,199.00
$795.00 - $795.00
$795.00
$795.00 - $795.00
$795.00

Askar SQA55 55mm f/4.8 Quintuplet APO

ASK-ASKSQA55
2 in stock

55mm Aperture Quintuplet APO Astrograph Fast f/4.8 Focal Ratio 264mm Focal Length Covers a 44mm Full-Frame Image Circle 14-Blade Aperture with f/4...

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$795.00 - $795.00
$795.00
$795.00 - $795.00
$795.00
$1,199.00 - $1,199.00
$1,199.00
$1,199.00 - $1,199.00
$1,199.00

Askar 103APO f/6.8 Triplet

ASK-ASKAPO103
1 in stock

103mm Aperture Triplet Air-Spaced APO Objective 700.4mm Focal Length f/6.8 Native Focal Ratio Includes One ED Glass Element for Superb Color Corre...

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$1,199.00 - $1,199.00
$1,199.00
$1,199.00 - $1,199.00
$1,199.00
$1,098.00 - $1,098.00
$1,098.00
$1,098.00 - $1,098.00
$1,098.00

William Optics Gran Turismo 71 APO Triplet

WO-A-F71GTII-RD

71mm Triplet Apochromatic Lens 419mm Focal Length at f/5.9 44mm Full-Frame Image Circle 2.5" Rack & Pinion Focuser OTA Weight: 2.95 kg (6.5 lb...

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$1,098.00 - $1,098.00
$1,098.00
$1,098.00 - $1,098.00
$1,098.00
$659.00 - $659.00
$659.00
$659.00 - $659.00
$659.00

Askar 71F Quadruplet Flat-Field APO f/6.9

ASK-ASAPO71F
1 in stock

71mm Aperture Quadruplet APO Optical Design 490mm Focal Length at f/6.9 44mm Full-Frame Corrected Image Circle Integrated Field Flattener 3.0kg To...

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$659.00 - $659.00
$659.00
$659.00 - $659.00
$659.00
$676.83 - $697.00
$676.83 - $697.00
$676.83 - $697.00
$676.83

William Optics Zenithstar 61II APO

Options available

61mm Aperture Apochromatic Doublet Refractor Ohara FPL-53 ED Glass Element Fast f/5.9 Focal Ratio for Wide-Field Imaging Includes Flat61A Field Fl...

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$676.83 - $697.00
$676.83 - $697.00
$676.83 - $697.00
$676.83
$949.00 - $949.00
$949.00
$949.00 - $949.00
$949.00

Askar FRA300 Pro 60mm f/5 Quintuplet APO

ASK-FRA300

60mm Aperture Quintuplet APO Astrograph 300mm Focal Length at a Fast f/5 Focal Ratio 44mm Full-Frame Image Circle Integrated Petzval Corrector Des...

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$949.00 - $949.00
$949.00
$949.00 - $949.00
$949.00
$299.00 - $299.00
$299.00
$299.00 - $299.00
$299.00

Askar 50P f/3.8 Quadruplet APO Telescope

ASK-50P
5 in stock

50mm Aperture Quadruplet APO Optics Ultra-Fast f/3.8 Focal Ratio 190mm Focal Length Natively Flat Field for APS-C Sensors Standard 55mm Back Focus...

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$299.00 - $299.00
$299.00
$299.00 - $299.00
$299.00
$1,998.00 - $2,198.00
$1,998.00 - $2,198.00
$1,998.00 - $2,198.00
$1,998.00

William Optics Fluorostar 91

Options available

91mm Aperture Apochromatic Triplet FPL-53 Glass for Superior Color Correction Strehl Ratio Exceeding 0.95 3.3" Dual-Speed Rack & Pinion Focuse...

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$1,998.00 - $2,198.00
$1,998.00 - $2,198.00
$1,998.00 - $2,198.00
$1,998.00
$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
3 in stock

51mm Aperture Diameter 178mm Focal Length f/3.5 Focal Ratio 6-Element Petzval Optical Design 43.2mm Full-Frame Image Circle WIFD Rack & Pinion...

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$988.00 - $988.00
$988.00
$988.00 - $988.00
$988.00
$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

Apochromatic Petzval-like Optical Design WIFD (William Optics Internal Focuser Design) Integrated Bahtinov Mask in Dust Cap Included M48 Camera Ad...

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$1,398.00 - $1,398.00
$1,398.00
$1,398.00 - $1,398.00
$1,398.00
$1,999.00 - $1,999.00
$1,999.00
$1,999.00 - $1,999.00
$1,999.00

Askar FRA500 90mm f/5.6 Quintuplet APO

ASK-FRA500

90mm Aperture Quintuplet APO Optics 500mm Focal Length at f/5.6 Massive 55mm Flat-Field Image Circle Includes Two ED Glass Elements Total Assemble...

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$1,999.00 - $1,999.00
$1,999.00
$1,999.00 - $1,999.00
$1,999.00
$3,395.00 - $3,395.00
$3,395.00
$3,395.00 - $3,395.00
$3,395.00

Askar SQA106 106mm f/4.8 Quintuplet APO

ASK-SQA106
1 in stock

106mm Aperture f/4.8 Focal Ratio 509mm Focal Length Quintuplet Petzval APO Optical Design 55mm Image Circle for Medium Format Description FAQ S...

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$3,395.00 - $3,395.00
$3,395.00
$3,395.00 - $3,395.00
$3,395.00
$2,395.00 - $2,395.00
$2,395.00
$2,395.00 - $2,395.00
$2,395.00

Askar SQA85 85mm f/4.8 Quintuplet APO

ASK-SQA85
1 in stock

85mm Aperture 408mm Focal Length (f/4.8) Quintuplet Petzval APO Optical Design Supports Full-Frame (44mm) Image Circle 3.64kg OTA Weight Descri...

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$2,395.00 - $2,395.00
$2,395.00
$2,395.00 - $2,395.00
$2,395.00
$1,098.00 - $1,098.00
$1,098.00
$1,098.00 - $1,098.00
$1,098.00

William Optics RedCat 61 WIFD

WO-T-C-61RD
1 in stock

61mm Aperture Petzval-like Astrograph Fast f/4.9 Focal Ratio WIFD (William Optics Internal Focus Design) Focuser Requires No Backfocus Calculation...

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$1,098.00 - $1,098.00
$1,098.00
$1,098.00 - $1,098.00
$1,098.00
$2,599.00 - $2,599.00
$2,599.00
$2,599.00 - $2,599.00
$2,599.00

Askar FRA600 108mm f/5.6 Quintuplet APO

ASK-FRA600

108mm Aperture 600mm Focal Length (f/5.6) Quintuplet Flat-Field APO Optical Design 66mm Corrected Image Circle Total Weight of 6.5kg Descriptio...

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$2,599.00 - $2,599.00
$2,599.00
$2,599.00 - $2,599.00
$2,599.00
$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

108mm Aperture, 5-Element Advanced Petzval Optical Design Fast f/4.8 Focal Ratio with 518mm Focal Length Massive 60mm Flat-Field Image Circle Pate...

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$3,998.00 - $3,998.00
$3,998.00
$3,998.00 - $3,998.00
$3,998.00
$2,499.00 - $2,499.00
$2,499.00
$2,499.00 - $2,499.00
$2,499.00

Askar 140APO f/7 Triplet

ASK-ASKAPO140
2 in stock

140mm Aperture 980mm Focal Length f/7 Focal Ratio Air-Spaced Triplet APO with ED Glass OTA Weight: 9.2kg 125mm Retractable Rear Tube Descriptio...

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$2,499.00 - $2,499.00
$2,499.00
$2,499.00 - $2,499.00
$2,499.00
$1,499.00 - $1,499.00
$1,499.00
$1,499.00 - $1,499.00
$1,499.00

Askar 80PHQ f/7 Quadruplet APO

ASK-80PHQ

80mm Aperture 600mm Focal Length (f/7.5) Quadruplet APO Optics with 2 ED Elements 44mm Full-Frame Image Circle 3.9kg Optical Tube Weight Descri...

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$1,499.00 - $1,499.00
$1,499.00
$1,499.00 - $1,499.00
$1,499.00
$2,299.00 - $2,299.00
$2,299.00
$2,299.00 - $2,299.00
$2,299.00

Askar 107PHQ f/7 Quadruplet APO

ASK-107PHQ
1 in stock

107mm Quadruplet APO Optical Design 749mm Focal Length at f/7 44mm Corrected Image Circle for Full-Frame Sensors Integrated Field Flattener for Si...

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$2,299.00 - $2,299.00
$2,299.00
$2,299.00 - $2,299.00
$2,299.00
$3,598.00 - $3,598.00
$3,598.00
$3,598.00 - $3,598.00
$3,598.00

William Optics Fluorostar 120

Options available

120mm Aperture FPL-53 Triplet Apochromatic Optics 3.3" Rack & Pinion Focuser Built-in Camera Angle Rotator Integrated Bahtinov Mask Descrip...

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$3,598.00 - $3,598.00
$3,598.00
$3,598.00 - $3,598.00
$3,598.00
SVBONY Petzval Refractor Astrograph Lens | SVBONY SV545
$399.99 - $399.99
$399.99
$399.99 - $399.99
$399.99

SVBONY SV545 45mm f/4.5 203mm Petzval Refractor Astrograph Lens

SV-W9317B

45mm Aperture 203mm Focal Length (f/4.5) 5-Element Petzval Optical Design Native Flat-Field Astrograph Helical Focuser with 360º Rotator M48x0.75 ...

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$399.99 - $399.99
$399.99
$399.99 - $399.99
$399.99
Askar 91F Flat-Field Astrograph
$999.00 - $999.00
$999.00
$999.00 - $999.00
$999.00

Askar 91F Flat-Field Astrograph

ASK-ASAPO91F

91mm Aperture Quadruplet APO Optics 609mm Focal Length at f/6.7 44mm Full-Frame Corrected Image Circle Integrated Field Flattener Design 3.92kg Ne...

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