William Optics January Sale 2025

Brand new William Optics GuideStar 61 F/5.9 APO. Comes complete with matching carrying case. Available in 3 colours to match your William Optics OTA.

The newborn Zenithstar 61II (2020 Model) is the most versatile and portable scope ever made by William Optics. It provides and excellent sharp image with any DSLR for astrophotography or wildlife photography.

Zenithstar 73 is a greatly versatile and portable refractor telescope for beginners and veterans alike. Designed for both astrophotography and wildlife photography, high power visual observing through the Zenithstar 73 is also hugely satisfying.

William Optics RedCat 51 v1.5 is a superb widefield imaging telescope with a flat field and large helical focuser. Special offer price whilst stocks last!

The very latest RedCat 51 II by William Optics features an improved helical focuser and an updated tension adjustment to give you the best possible widefield imaging OTA.

The new GT71 features a 3-element objective using high-quality FPL-53 extra-low dispersion glass that reduces any secondary spectrum to an unbelievable degree.

We are excited to introduce our latest addition to the William Optics family: the WO MiniCat51.

The brand new William Optics RedCat 51 v3 features the same optical quality of previous models but with the new WIFD internal focusing mechanism.

Introducing the WILLIAM OPTICS Internal Focus Design (WIFD) Apochromatic Series. This innovative and revolutionary design combines a precision (Patented) internal focusing mechanism with the highest quality optics available, providing the ultimate Apochromatic refractor for astrophotography.

The new 2019 GT81 MKIV (Fourth Generation) three-element super APO Anniversary offer superb quality for imaging and visual use at an affordable price！From the pristine white finish on the CNC to the elegant gold trim which has more than just good looks.

The brand new William Optics RedCat 61 is the latest Cat to join the family. Featuring high quality glass in a Petzval design for a flat field edge to edge, plus the brand new internal focusing mechanism.

The WO Cat71 is a 71-mm f/4.9 refractor using a Petzval design with a doublet front element incorporating FPL-53 glass, plus a single central element and a single rear lens.

Step up your astrophotography game with the William Optics RedCat 91, an advanced apochromatic refractor tailored for full-frame and medium-format cameras.

The brand new Fluorostar 120 APO by William Optics meets the demands of the modern astrophotographer with high quality glass, 3.3" heavy duty focuser with rotator and bahtinov mask.