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Apochromatic Refractors

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Tele Vue TV-NP127is OTA 1
$7,373.00 - $7,373.00
$7,373.00
$7,373.00 - $7,373.00
$7,373.00

Tele Vue TV-NP127is OTA

TV-NPI-5054

Aperture: 127mm Focal Length: 660mm Focal Ratio: f/5.2 Optical Design: APO Nagler-Petzval (4 elements / 2 groups) Focuser: 2.4" Focusmate Dual-Spe...

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$7,373.00 - $7,373.00
$7,373.00
$7,373.00 - $7,373.00
$7,373.00
$2,598.00 - $2,998.00
$2,598.00 - $2,998.00
$2,598.00 - $2,998.00
$2,598.00

William Optics Cat 91 WIFD

Options available
1 variants in stock

91mm Aperture, 448mm Focal Length (f/4.9) 5-Element Advanced Petzval Optical Design 55mm Corrected Image Circle WIFD Rack & Pinion Internal Fo...

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$2,598.00 - $2,998.00
$2,598.00 - $2,998.00
$2,598.00 - $2,998.00
$2,598.00
$3,598.00 - $3,598.00
$3,598.00
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$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
$4,378.00 - $5,668.00
$4,378.00 - $5,668.00
$4,378.00 - $5,668.00
$4,378.00

William Optics Fluorostar 132

Options available

132mm Aperture, 910mm Focal Length (f/6.9) Air-Spaced Triplet Apochromatic Objective Premium FPL-53 Glass for Superior Color Correction Heavy-Duty...

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$4,378.00 - $5,668.00
$4,378.00 - $5,668.00
$4,378.00 - $5,668.00
$4,378.00
$7,398.00 - $8,998.00
$7,398.00 - $8,998.00
$7,398.00 - $8,998.00
$7,398.00

William Optics Fluorostar 156

Options available

156mm Aperture Triplet Apochromat 1217mm Focal Length (f/7.8) FPL-53 & Lanthanum Glass Elements 3.7" Rack & Pinion Focuser Thermally Stabl...

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$7,398.00 - $8,998.00
$7,398.00 - $8,998.00
$7,398.00 - $8,998.00
$7,398.00
$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
$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
$2,198.00 - $2,198.00
$2,198.00
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$2,198.00

William Optics Gran Turismo WIFD 81

Options available

81mm Aperture Triplet Apochromatic Refractor FPL-53 Ohara Glass for Superior Color Correction William Optics Internal Focusing Design (WIFD) Inclu...

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$2,198.00 - $2,198.00
$2,198.00
$2,198.00 - $2,198.00
$2,198.00
$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
$4,198.00 - $4,198.00
$4,198.00
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$4,198.00

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

WO-T-P-111BU

111mm Aperture 7-Element Astrograph 528mm Focal Length at a fast f/4.8 45mm Image Circle for Full-Frame Sensors William Optics Internal Focus Desi...

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

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

WO-T-P-181RD

181mm Aperture, 998mm Focal Length Fast f/5.5 Focal Ratio 7-Element Optical Design with 3 Super ED Glass Elements 55mm Corrected Image Circle 4.1-...

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

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

WO-T-P-68BU

68mm Aperture 7-Element Astrograph Fast f/3.8 Focal Ratio 260mm Focal Length 48mm Full-Frame Image Circle Weighs only 2.98 kg (6.57 lbs) WIFD Focu...

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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
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$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
$1,098.00 - $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
$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
William Optics Ultra-Cat 131 f/4.9 Petzval Astrograph
$5,398.00 - $5,398.00
$5,398.00
$5,398.00 - $5,398.00
$5,398.00

William Optics Ultra-Cat 131 f/4.9 Petzval Astrograph

WO-T-C-131BR

131mm Aperture 648mm Focal Length (f/4.9) 5-Element Advanced Petzval Optical Design 60mm Flat-Field Image Circle Patented WIFD Internal Focuser 13...

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$5,398.00 - $5,398.00
$5,398.00
$5,398.00 - $5,398.00
$5,398.00
$3,998.00 - $3,998.00
$3,998.00
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$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
$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
6 in stock

56mm Aperture, 269mm Focal Length (f/4.8) 5-Element Advanced Petzval Optical Design 50mm Image Circle for Full-Frame Sensors William Optics Intern...

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$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

76 mm Aperture, 365 mm Focal Length (f/4.8) 5-Element Advanced Petzval Optical Design 50 mm Corrected Image Circle William Optics Internal Focusin...

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$2,198.00 - $2,198.00
$2,198.00
$2,198.00 - $2,198.00
$2,198.00
$680.20 - $697.00
$680.20 - $697.00
$680.20 - $697.00
$680.20

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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$680.20 - $697.00
$680.20 - $697.00
$680.20 - $697.00
$680.20
$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

Patented William Optics Internal Focus Design (WIFD) Rigid M92 Rear Thread with M63 Adapter Included Vixen/Arca-Swiss Dual-Sided Mounting Plate In...

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$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
1 in stock

110mm Aperture 766mm Focal Length (f/7) 4-Element Apochromatic Optics Integrated Field Flattener 3-inch Dual-Speed Focuser 14.9 lb. Weight with Ha...

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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
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$1,999.00

ZWO FF131-APO 131mm Quadruplet Refractor F/7.5

ZWO-FF131-APO
1 in stock

131mm Aperture 983mm Focal Length (f/7.5) 4-Element Air-Spaced Quadruplet Design 3-inch Dual-Speed Rack & Pinion Focuser 20.7 lb. Weight with ...

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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
2 in stock

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