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William Optics RedCat (WhiteCat) 51 APO Apochromatic Quadruplet Refractor Astrograph Telescope - WHITE

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in In stock (2)
4.50 kg
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including VAT 20.00 % ( £108.17 )

William Optics RedCat / WhiteCat 51 APO Apochromatic Quadruplet Refractor Astrograph Telescope - WHITE


From the beginning, the goal was to create the best possible design for an affordable, small, lightweight and fast Apochromatic refractor for astro photography needs.

The unique optical design includes the highest quality glass for the best possible colour correction and flat field. The result is a 51mm objective lens, in a sleek Petzval design, using Synthetic Flouride (FPL53 and FPL51) glass for a full frame flat field image.

The optical quality provides exceptional performance at a fast focal ratio of f/4.9.

The premium quality red finish and calibrated helical focuser offers high-quality appearance.

The lens tube includes a specially designed base that provides light but solid mounting options, including a reversible base plate for either Vixen-style or Arca-Swiss mounting.

The Bahtinov mask, built into the cover helps to achieve perfect optical focus.


  • Lens Type: Prime Lens
  • Focal Length: 250mm
  • Aperture: 51mm
  • Focal Ratio: f/4.9
  • Camera Format (compatibility): APS-C, Full Frame
  • Max Image Circle: Full Frame
  • Focus Mode: Manual Focus
  • Lens Structure: Petzval (4 elements in three groups)
  • Dimensions: 225mm x 80mm x 80mm
  • Weight: 1.47kg
  • Interchangeable T-mounts: Canon EF, Nikon F, Sony E, Pentax, Micro Four Thirds


There will be only one cat in the box, a RedCat (sorry, not the furry one...)


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