William Optics

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!

This revolutionary new WO x0.72 Reducer flattener it’s Adjustable was made for 6 -7.8 F ratio refractors.

William Optics Flattener 7 for Gran Turismo 102 APO Refractor

This revolutionary new WO FF68III Adjustable Flattener was made for 6 -7.5 F ratio refractors.

FLAT6AIII special edition for Fluorostar 91

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.

New Adjustable Flat61 for Z61

William Optics ZenithStar 73 Field Flattener with Adjustable Backfocus

A precision adapter designed to connect the William Optics Flat 6A reducer/flattener seamlessly to the FLT91 telescope for optimal imaging performance.

William Optics FLAT68III Longer Adjusting Adapter
for Gran Turismo 81 WIFD - M54

William Optics FLAT68III Longer Adjusting Adapter
for Gran Turismo 81 WIFD - M48

Use this adapter for longer adjusting with William Optics field flatteners

This field flattener from Williams Optics adapts M80 to M54. (M80 to M54 x 0.75) (Flat68III, Flat7A)

This field flattener from Williams Optics adapts M80 to M68. (M80 to M68 x 1.0) (Flat68III, Flat7A)