Products

Fits Dew Shields with Outer Diameters from 243mm to 308mm Generates a Clear Three-Spike Diffraction Pattern for Precise Focusing Essential Tool fo...

243mm total length Functions as both a carrying handle and an accessory saddle Patented design for rigidity and ergonomics Vixen-style saddle for ...

Compatible with William Optics' slide-base guide rings Can be used to make William Optics telescopes portable Description The Wil...

Provides 2x magnification Enables binoviewers to reach focus in most telescopes Standard 1.25" nosepiece format Threads directly onto the binoview...

Adapts 3.5" William Optics focusers to a 2" receiver Features the secure, self-centering RotoLock mechanism Connects via M92 x 1 male threads Adds...

30mm Optical Length Connects M80 x 0.75 to M54 x 0.75 Threads For William Optics Flat68III & Flat7A Flatteners Description FAQ Specificatio...

Adds 67 mm of optical length to your imaging train Features M92 male and female threads for a secure connection Designed for William Optics FLT 11...

4" extension tube designed for William Optics FLT Series Provides additional back focus for various optical setups ...

Provides a fully corrected image (upright and left-right correct) Comfortable 45° viewing angle for terrestrial observation Fits standard 1.25" fo...

Connects M48 (2-inch) Threaded Correctors to Canon EOS Cameras Wide M48 Aperture Eliminates Vignetting on Full-Frame Sensors Adds a Precise 10.6 m...

Connects M48-threaded correctors to Canon EOS R mirrorless cameras Wide 48mm aperture minimizes vignetting on full-frame sensors Precisely machine...

Connects M48-threaded correctors to Fujifilm X-mount (Fuji FX) mirrorless cameras Wide 48mm aperture minimizes vignetting on APS-C sensors Precise...

Connects M48 Accessories to Nikon F-Mount Cameras Precisely machined 8.2 mm optical length achieves exact 55mm back focus when combined with camer...

Connects M48 accessories to Nikon Z-mount mirrorless cameras Precisely machined 38.4 mm optical length achieves exact 55mm back focus when combine...

Connects Pentax K-Mount Cameras to M48 Accessories Precisely machined 9.3 mm optical length achieves exact 55mm back focus when combined with came...

Connects Sony E-mount cameras to M48 accessories Provides a precise 36.7 mm optical length M48 (female) threads reduce vignetting on large sensors...

50mm Aperture Doublet Lens 200mm Focal Length f/4.0 Focal Ratio 1.25" RotoLock Eyepiece Holder Total Weight: 0.42 kg / 0.93 lbs Description FAQ...

Provides a precise 54mm of optical length Connects the FLAT68III flattener to M48 imaging trains Designed specifically for the William Optics Gran...

Fits Telescope Dew Shields from 75mm to 110mm Creates Sharp Diffraction Spikes for Precise Focusing Ideal for Small Apochromatic Refractors and As...

Provides a fully corrected, upright, and non-reversed image Designed for 1.25" focusers and eyepieces 90° viewing angle for comfortable observing ...

1.25" Barrel Diameter 99% Dielectric Coated Mirror 1/12λ Mirror Surface Accuracy 12mm Thick Mirror Substrate 100% Real Carbon Fiber Side Plates ...

2" Barrel with 90° Viewing Angle 99% Reflectivity Dielectric Coatings 1/12th Wave Precision Polished Mirror 12mm Thick Mirror Substrate for Therma...

1.0x Flattener Power Designed for William Optics Zenithstar 61 Full-Frame Sensor Coverage Adjustable Back Focus Mechanism M54 Telescope Thread &am...

0.8x Focal Reducer & Field Flattener Optimized for GT71, GT81, Z81 & Z103 Refractors Illuminates Full-Frame Sensors Adjustable Back Focus ...