William Optics MiniCat 51 WIFD

Designed for photography enthusiasts who love wide-angle views. Its standout feature is an ultra-bright f/3.5 aperture, allowing you to capture faint nebulae or comets in a very short time. (The f/3.5 aperture lets in twice as much light as an f/5 aperture.)

The MiniCat uses the latest Petzval design with 6 lens elements, including 2 Super ED and lanthanum lenses to perfectly control chromatic aberration. It’s currently the only high-quality, short focal length 178mm f/3.5 astrograph telescope available on the market.

The MiniCat holds three unique patents, ensuring easy and perfect focusing along with coaxial image quality to prevent drawtube tilt issues caused by optical misalignment.

Special Note

Cat Toy is not included with SpaceCat Edition

Edge Star Performance:
Due to the nature of MiniCat’s fast aperture optical design, edge stars may not be as round as with other RedCats. However, our tests show it still outperforms conventional lenses. For the best results, we recommend using aberration correction software like BXT, peripheral distortions can be perfectly corrected on APS-C sensors, while Full Frame may need some fine-tuning for even better results.

Specifications

• Lens Type – 6-Element Petzval
• Lens Elements – Super ED Glass x2
• Focal Length – 178 mm
• Diameter – 51 mm
• Focal Ratio – f/3.5
• Image Circle – 43.2 mm
• Focuser – WIFD R&P Focuser Compatible with EAF
• Focuser Travel – 0-28 mm (Ruler to 40)
• Back Spacing – 58-30mm
• Adapter Included – Tilt Adjuster
• Rotator- M54 → M48 Adapter
• Optional Flattener – No Flattener Required
• T-Mount Support – Canon EF & RF, Nikon F & Z, Sony E, Pentax K, MFT (M4/3), FUJI X
• Camera Format – Full Frame, APS-C, M4/3
• Dovetail Type – Vixen ↔︎ Arca-Swiss
• Tube Length – 210 mm
• OTA Weight – 1.67 kg / 3.68 lbs
• Total Weight – 2.29 kg / 5.05 lbs