UltraCat 56

The Ultracat 56 offers an optical upgrade from the venerable RedCat 51, with a superior 5-element advanced Petzval design delivering improved performance out to the corners of full frame sensors. The RMS spot size all the way out to the corners represents a 41% improvement vs the RedCat 51, with tighter RMS across the field for improved performance with high megapixel sensors. Additional features like the built-in sensor tilt exterminator and camera angle adjuster allow for easy adjustments without removing the camera. Sensor Tilt Xterminator (STX) The built-in STX allows quick side-access tilt adjustments without removing the camera. Camera Angle Rotator Correct any angular discrepancies, and get the perfect angle on your images.   Specifications Lens Type 5 Elements Advanced Petzval Design Focal Length 269 mm Diameter 56 mm Focal Ratio f/4.8 Image Circle 50 mm Focuser WIFD R&P Focuser Focuser Travel Length 0-30 mm Adapter Included Sensor Tilt Xterminator Rotator M54 Camera Adapter M48 Camera Adapter Optional Flattener No Flattener Required Camera Format Full Frame APS-C M4/3 Total Weight 3.21 kg / 7.08 lbs OTA Weight 2.56 kg / 5.64 lbs Tube Length 296.3 mm - 348.3 mm   Optical Performance Product Manual