William Optcis

William Optics Flourostar 91 with 3.3" Rack & Pinion Focuser - Available in Red, Gold, and Space Gray.

The William Optics Gran Turismo 81mm refractor features a CNC machined optical tube with an immaculate white finish and Trim color of your choice

The 3.3" William Optics Rack & Pinion RC Focuser is made to work with GSO Ritchey-Chrétien telescopes. This type of focuser is compatible with Apertura RC telescopes as well!

William Optics GT71 f/5.9 FPL-53 Triplet Refractor w/ Dual Dovetail Plate - A-F71GTII

This 81mm ZenithStar APO refractor is a great addition to the ranks of telescopes that are devoted to providing fantastic astro-images

On the telescope side of the focuser, you will find a large flange to connect the focuser to the OTA. This flange also works as a spacer, providing more space if you would like to add a user supplied filter wheel and/or Off-Axis Guider (OAG).

The body

Works great with most cameras, camera lenses, and small scopes on either a Vixen-style mount or an Arca Swiss saddle.

This William Optics ZenithStar 61mm APO refractor with WO Bahtinov mask cover provides more portability and utility than any telescope ever offered by William Optics

This 0.8x Reducer/Field Flattener from William Optics is a great accessory that improves image quality by being able to adjust spacing without the need for extension tubes

This innovative William Optics Vixen Base is an upgrade for the iOptron SkyGuider Pro Mount.

This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7.5 ratio refactors.

The 32 mm UniGuide Scope from William Optics is a beautifully designed guide scope that matches perfectly with other William Optics refractors and accessories.

The William Optics ZenithStar61 Upgrade Mounting Rings and CAT Handle Bar are designed to work with the ZenithStar 61 refractor. This is a great upgrade to your William Optics ZenithStar 61!

This user-friendly Vixen-style quick-release bracket for 50 mm finderscopes is an excellent value.

This high precision William Optics T-Mount adapter contains wide 48 mm t-threads

Made specifically for Canon EOS R mirrorless DSLR cameras

The Diffraction Spikes Bahtinov Focusing Mask provides 92% light transmission to make focusing easier.

This Synta style mounting base from William Optics is a great tool for keeping your finderscope fastened to your optical tube assembly