Telescope Brand
William Optics
William Optics specialises in premium apochromatic refractors and astrophotography accessories. Their instruments are particularly well regarded in the imaging community for their flat field performance, build quality, and colour correction.
6 telescopes in our database
William Optics
William Optics FluoroStar 91
The FluoroStar 91 is William Optics' premium fluorite triplet refractor — using natural fluorite glass rather than synthetic ED glass for the chromatic aberration correction.
William Optics
William Optics GT102
The GT102 is William Optics' 102mm ED triplet, a step up in aperture and focal length from the GT81.
William Optics
William Optics GT81
The GT81 is William Optics' three-element ED triplet at 81mm, stepping up from the doublet Zenithstar series to full apochromatic correction.
William Optics
William Optics RedCat 51
The RedCat 51 is a Petzval-design four-element refractor — a different optical formula from the ED doublets and triplets in the WO range.
William Optics
William Optics Zenithstar 61
The Zenithstar 61 is a beautifully made compact apochromatic refractor that has become one of the most popular imaging OTAs in its class.
William Optics
William Optics Zenithstar 73
The Zenithstar 73 is the step up from William Optics' popular Zenithstar 61, offering 73mm of ED doublet aperture in the same well-made compact package.