Products

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...

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...

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

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

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...

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

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 ...

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...

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

Pier System designed for telescopes and instruments Offers high stability and adjustability Description In the Box Warranty The...

Designed specifically for the William Optics ZenithStar 61 I Provides a secure, rigid mounting point for the optical tube Features an integrated C...

Precise 90mm Inner Diameter Solid, All-Metal Construction Secures Optical Tube for Astrophotography Requires User Measurement for Fit Confirmation...

Provides critical clearance for cameras and filter wheels Improves balance options for complex imaging trains Designed for William Optics Universa...

90 kg (198 lbs) Loading Capacity Lightweight 7 kg Aluminum Alloy Construction 100 mm (4") Diameter Pillar for Maximum Rigidity Includes 3/8" Adapt...

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...

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-...

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...

Provides precise focusing for Ritchey-Chrétien telescopes Includes an optional 0.8x reducer flattener for improved image quality Description...

Red dot finder for easy target acquisition Includes Vixen-style mounting base for versatile attachment Description The William...

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

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

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

Converts Astronomical Telescopes for Terrestrial Viewing 90-Degree Viewing Angle Accepts Standard 1.25" Eyepieces Anti-Reflection Coated BAK7 Pris...

Length: 90 mm Dovetail Type: Vixen-Style Weight: 230 g (0.51 lbs) Full-Length, Non-Marring Clamp Signature William Optics Red Anodized Finish D...