Skip to content
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

Filters

$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...

View full details
$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...

View full details
$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...

View full details
$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...

View full details
$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
$2,198.00 - $2,198.00
$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...

View full details
$2,198.00 - $2,198.00
$2,198.00
$2,198.00 - $2,198.00
$2,198.00
$398.00 - $438.00
$398.00 - $438.00
$398.00 - $438.00
$398.00

William Optics GuideStar 61

Options available

FPL53 ED Air-Spaced Doublet Lens Dual-Purpose Guide Scope and Imaging Telescope Draw-Tube (Push-Pull) Focuser Rotating Lens Assembly for Image Fra...

View full details
$398.00 - $438.00
$398.00 - $438.00
$398.00 - $438.00
$398.00
$276.00 - $288.00
$276.00 - $288.00
$276.00 - $288.00
$276.00

William Optics High Latitude WO Vixen Style Base Mount

Options available

Designed specifically for the iOptron Skyguider Pro Enables stable, precise polar alignment at high latitudes Includes Vixen-style mounting saddle...

View full details
$276.00 - $288.00
$276.00 - $288.00
$276.00 - $288.00
$276.00
$60.00 - $60.00
$60.00
$60.00 - $60.00
$60.00

William Optics Image Plane Tilt Adjuster

WO-M-FD-RC51

Designed exclusively for the William Optics RedCat 51 astrograph Corrects image plane tilt for perfectly round stars across the frame Adds only 12...

View full details
$60.00 - $60.00
$60.00
$60.00 - $60.00
$60.00
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00

William Optics iOptron Skyguider Pro Dec Adapter

WO-M-IOPSG-SPM

Directly Mounts William Optics Scopes to iOptron Skyguider Pro Replaces the Standard Declination (DEC) Bracket Low-Profile Design for Enhanced Sta...

View full details
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00
$91.00 - $91.00
$91.00
$91.00 - $91.00
$91.00

William Optics Long Version Vixen-Style Dovetail Plate

WO-M-PV-LII-RD
2 in stock

290 mm Extended Length for Balancing Standard Vixen-Style Dovetail Profile Weighs 0.64 kg (1.42 lbs) 90 mm Wide Platform for Stability Descript...

View full details
$91.00 - $91.00
$91.00
$91.00 - $91.00
$91.00
$58.00 - $58.00
$58.00
$58.00 - $58.00
$58.00

William Optics Longer adjusting adapter for FLAT68III, FLAT7A

WO-AD-M80-45-M48

Connects FLAT68III & FLAT7A Flatteners to M48 Imaging Trains Provides a Fixed 45mm Optical Length Input Thread: M80 x 0.75 Male Output Thread:...

View full details
$58.00 - $58.00
$58.00
$58.00 - $58.00
$58.00
$116.00 - $139.00
$116.00 - $139.00
$116.00 - $139.00
$116.00

William Optics Losmandy Style Type D

Options available
3 variants in stock

Length: 400 mm Weight: 1.44 kg / 3.17 lbs Width: 105 mm Dovetail Type: Losmandy D-Style Description FAQ Specifications In the Box Downloads War...

View full details
$116.00 - $139.00
$116.00 - $139.00
$116.00 - $139.00
$116.00
$229.00 - $229.00
$229.00
$229.00 - $229.00
$229.00

William Optics Low Latitude WO Vixen Style Base Mount

WO-YG-IO-SG01L

Designed for Low Latitude Observers Solid Aluminum Alloy Construction Precision Altitude & Azimuth Adjustment Knobs Vixen-Style Mounting Base ...

View full details
$229.00 - $229.00
$229.00
$229.00 - $229.00
$229.00
$15.00 - $15.00
$15.00
$15.00 - $15.00
$15.00

William Optics M48 Female to M42 Male Adapter

WO-YE-M48-42

Connects M48 Female Threads to M42 Male Threads Adds Only 5.3mm of Optical Path Length Standard 2" Filter Thread (M48x0.75) to T-Thread (M42x0.75)...

View full details
$15.00 - $15.00
$15.00
$15.00 - $15.00
$15.00
William Optics M48 Filter Adapters for Cat Eyes Binoculars
$9.00 - $9.00
$9.00
$9.00 - $9.00
$9.00

William Optics M48 Filter Adapters for Cat Eyes Binoculars

WO-AD-2X42-M48

Enables use of standard 2-inch (M48 x 0.75) filters Connects to the M44.5 x 0.75 objective threads on Cat Eyes Binoculars Adds a minimal 6 mm of o...

View full details
$9.00 - $9.00
$9.00
$9.00 - $9.00
$9.00
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00

William Optics M48 Push-in Nosepiece for WO 2" Diagonals & UniGuide Scope

WO-WD-DIG2A
1 in stock

Connects M48 Threaded Accessories to 2" Push-in Focusers Female M48 Threads for 2" Filter Attachment Adds a Fixed 36 mm of Optical Length Male M48...

View full details
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00
William Optics M54 Camera Angle Rotator (CAA)
$119.00 - $119.00
$119.00
$119.00 - $119.00
$119.00

William Optics M54 Camera Angle Rotator (CAA)

WO-M-CAA54
1 in stock

360° of precise framing rotation Standard M54 male and female threads Adds a minimal 30.2 mm to the optical path Securely locks orientation for lo...

View full details
$119.00 - $119.00
$119.00
$119.00 - $119.00
$119.00
$48.00 - $48.00
$48.00
$48.00 - $48.00
$48.00

William Optics M63 Female to 2" Push-in Adapter for P-FLAT6AIII

WO-YE-M63F-2IN-PI
1 in stock

Connects P-FLAT6AIII Flattener to 2" Focuser Female M63 Threads for Flattener Connection Male 2" Push-in Barrel for Focuser Internal M48 Female Th...

View full details
$48.00 - $48.00
$48.00
$48.00 - $48.00
$48.00
$27.65 - $27.65
$27.65
$27.65 - $27.65
$27.65

William Optics M63 Female to 2" Push-in Adapter for P-FLAT6AIII - Used

WO-YE-M63F-2IN-PI
Only 1 left!

Connects P-FLAT6AIII Flattener to 2" Focuser Female M63 Threads for Flattener Connection Male 2" Push-in Barrel for Focuser Internal M48 Female Th...

View full details
$27.65 - $27.65
$27.65
$27.65 - $27.65
$27.65
$64.00 - $64.00
$64.00
$64.00 - $64.00
$64.00

William Optics M63(M) to M48(M) Photo Adapter

WO-P-PAM-63-48

Adds 80mm of Optical Length Connects to M63 Female Threads Outputs to M48 Male T-Threads Enables Focus Without a Field Flattener Designed for Will...

View full details
$64.00 - $64.00
$64.00
$64.00 - $64.00
$64.00
William Optics M92 to M63 Adapter for William Optics FLT91
$88.00 - $88.00
$88.00
$88.00 - $88.00
$88.00

William Optics M92 to M63 Adapter for William Optics FLT91

WO-YE-M92-63

Connects William Optics FLT91 Telescope to Flat6AIII Flattener Input Thread: M92 Male Output Thread: M63 Female Optical Path Length: 10.5 mm De...

View full details
$88.00 - $88.00
$88.00
$88.00 - $88.00
$88.00
$45.00 - $45.00
$45.00
$45.00 - $45.00
$45.00

William Optics Micro 4/3 48mm T-Mount for Olympus - Black

WO-TM-MFT-M48
3 in stock

Connects M48 Correctors to Olympus Micro 4/3 Cameras Fixed 35.6 mm Optical Length for Precise Back Focus Light-In Connection: M48 (Female) Thread ...

View full details
$45.00 - $45.00
$45.00
$45.00 - $45.00
$45.00
$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...

View full details
$988.00 - $988.00
$988.00
$988.00 - $988.00
$988.00
$90.00 - $90.00
$90.00
$90.00 - $90.00
$90.00

William Optics Mortar Pier Head Adapter - 3/8" Screw Mount

WO-YG-38-MTAD-BL

Designed to fit a 3/8" threaded pier. Universal 3/8" thread Limited lifetime warranty Description Warranty The William Optics M...

View full details
$90.00 - $90.00
$90.00
$90.00 - $90.00
$90.00