William Optics

7-Element APO with 3 ED Glasses Refractor Design F/5.5 Fast Focal Ratio Portable and Versatile Description Specifications In the Box ...

156mm APO F/6.7 Fast Focal Ratio Portable and Versatile Description Specifications In the Box Unleash your passion for astrophotography with...

132mm APO F/6.9 Fast Focal Ratio Portable and Versatile Description Specifications In the Box Unleash your passion for astrophotography with...

7-Element APO Refractor Design F/4.8 Fast Focal Ratio Wide Image Field Design (WIFD) Portable and Versatile Description Specifications I...

120mm APO F/6 Fast Focal Ratio Portable and Versatile Description Specifications In the Box Unleash your passion for astrophotography with t...

Petzval Design, No Backfocus Hassles Full-Frame & Medium-Format Ready, No Extra Flattener Needed Fast f/4.9 Focal Ratio Seamle...

7-Element APO Refractor Design F/3.8 Fast Focal Ratio WO Internal Focuser Design (WIFD) Portable and Versatile Description Specifications In th...

81mm APO F/5.9 Fast Focal Ratio Portable and Versatile Description Specifications In the Box Unleash your passion for astrophotography with ...

91mm APO using FPL-53 Glass F/5.9 Fast Focal Ratio Portable and Versatile Description Specifications In the Box Take your astrophotography t...

71mm APO F/4.9 Fast Focal Ratio Portable and Versatile Description Specifications In the Box Unleash your passion for astrophotography with ...

51mm 4-elements Petzval refractor 300mm focal length - f/4.9 focal ratio 46mm image circle - No field flattener required WIFD focuser design ...

71mm APO Triplet F/5.9 Fast Focal Ratio Portable and Versatile Description Specifications In the Box Unleash your passion for astrophotograp...

The MiniCat51 is a versatile and powerful option for astrophotography enthusiasts, offering superior optics in a sleek, portable design. Its WIFD ...

81mm APO using FPL-53 Glass F/6.9 Fast Focal Ratio Portable and Versatile Description Specifications In the Box Unleash your pa...

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

0.72x reducer/flattener for William Optics refractor telescopes Reduces focal length and corrects field curvature for improved astrophotogra...

51mm 4-elements Petzval refractor 250mm focal length - f/4.9 focal ratio 48mm image circle - No field flattener required! WIFD focuser design D...

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

73mm APO using FPL-53 Glass F/5.9 Fast Focal Ratio Portable and Versatile Description Specifications In the Box Unleash your passion for ast...

0.8x reducer/flattener for William Optics refractor telescopes Reduces focal length while correcting field curvature Description ...

Designed specifically for William Optics 68mm f/6 refractor telescopes Corrects field curvature for improved edge-to-edge sharpness De...

61mm APO using FPL-53 Glass F/5.9 Fast Focal Ratio Portable and Versatile Description Specifications In the Box Unleash your passion for ast...

61mm aperture apochromatic refractor telescope Versatile instrument for both guiding and wide-field astrophotography Description ...