[Refurbished] Ultra-Cat 76

The Ultra-Cat 76 is a high-performance 76mm apochromatic refractor, designed for astrophotographers who demand exceptional clarity and true color accuracy. With a 5-element advanced Petzval optical design, including super ED and lanthanum glass, and a fast f/4.8 focal ratio, this telescope delivers stunningly sharp, flat-field images across its 50mm image circle. Optimized for Full Frame, APS-C, and M4/3 sensors, it also offers compatibility with Medium Format cameras for outstanding wide-field astrophotography. Key Features: Advanced 5-Element Petzval Optics Eliminates field curvature, ensuring sharp, edge-to-edge stars without additional flatteners. 50mm Large Image Circle Fully supports Full Frame cameras, APS-C and M4/3 sensors for optimal performance. Compatible with Medium Format. Fast f/4.8 Optics Superior light-gathering capability, enabling deep-sky imaging with shorter exposure times. WIFD (William’s Internal Focuser Design) Patented internal rack-and-pinion focuser ensures stable and precise focusing. No vignetting or balance issues — ideal for astrophotography. Compatible with EAF (Electronic Automatic Focuser) for precision focus control. Sensor Tilt Xterminator (STX) & Rotator Integrated tilt adjuster eliminates sensor misalignment, ensuring uniform image sharpness. No Flattener Required The optical design naturally corrects field curvature, simplifying setup. Anti-Shrink Lens Cell Technology Reduces thermal expansion effects, maintaining perfect optical alignment in any climate. Patented Bahtinov Mask for Focusing Built-in focusing aid ensures pinpoint star sharpness with ease. Premium Build & Ergonomic Design Lightweight yet robust (4.31 kg / 9.5 lbs) construction with a sleek anodized finish. Patented handle bar design for enhanced portability and ease of use. Versatile Camera Compatibility Supports Canon EF, RF, Nikon F,Z, Sony E, Pentax K, MFT, and FUJI X mounts.