Ultra-Cat 56

The Ultra-Cat 56 is a compact astrograph built around a five-element Petzval design that delivers a flat imaging field directly at the focal plane, designed specifically for wide-field astrophotography with full-frame sensors. Fitted with five internal lens elements, a generous 56 mm aperture, and the patented William Optics internal focuser, the Ultra-Cat 56 is perfect for those seeking crystal clear astrophotos in a compact form. The telescope does not rely on external flatteners or reducers and was specifically designed for imaging with modern sensors. The innovative WIFD (William Optics Internal Focus Design) places the focusing mechanism at the center of the telescope to eliminate tube tilt, prevents optical path obstruction, and the sealed internal focusing mechanism minimizes dust exposure for reliable long-term use.