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  1. WILLIAM OPTICS | Navigate the Cosmos with Precision

    Explore the universe with precision-crafted optics from William Optics. Discover an unparalleled range of Refractor telescopes, binoculars, digital camera adapter lenses, eyepieces, …

  2. Telescope | William Optics

    Help me choose. Answer a few questions and get a personalized telescope recommendation. Get Started

  3. About Us | William Optics

    After two years of hard work, I started my own company, William Optics, in 1996, with the goal of producing affordable, high-quality refractor telescopes. In 2001, I introduced the Megrez 80F6, …

  4. Ultra Cat Series | William Optics

    Ultra-Sharp 5-Element Petzval Optics Redefines optical performance with a refined 5-element Petzval design, ensuring crisp, high-contrast views with outstanding color correction across …

  5. Ultra-Cat 108 | William Optics

    Researched and developed by WO, the innovative 5-element Petzval design redefines telescope optics. This advanced system achieves a flawless spot diagram across a medium-format …

  6. Collections | William Optics

    Explore the universe with precision-crafted optics from William Optics. Discover an unparalleled range of Refractor telescopes, binoculars, digital camera adapter lenses, eyepieces, …

  7. New Arrival | William Optics

    Be the first to hear about our promotions, new products and more.

  8. Zenithstar 61 II - WILLIAM OPTICS

    Unleash your passion for the cosmos with the compact and powerful William Optics ZenithStar 61 II APO Refractor. Featuring top-notch Ohara FPL-53 ED glass, this telescope delivers clear, …

  9. Cat 91 WIFD | William Optics

    Equipped with William Optics' WIFD focuser, the RedCat 91 provides precise, stable focusing without additional adjustments, enhancing the ease of use for both seasoned …

  10. Classic Cat Series | William Optics

    Highlights Precision Petzval Optics Innovative Petzval optics in the William Optics Redcat series provide sharp, high-contrast images with minimal chromatic aberration.