OTA · MSRP $1,398
William Optics Ultra-Cat 56
Key specifications
| Aperture | 56 mm |
|---|---|
| Focal length | 269 mm |
| Focal ratio | f/4.8 |
| Optical design | Other |
| Weight | 2.56 kg |
All specifications
| Focuser type | WIFD rack-and-pinion, EAF compatible, 0-30 mm travel |
|---|---|
| Tube length | 296.3 mm |
| Dovetail | Vixen |
About
A 56 mm f/4.8 five-element advanced Petzval astrograph needing no flattener, covering a 50 mm image circle. Built on the WIFD rack-and-pinion focuser with a sensor-tilt adjuster and rotator, on a dovetail that works as both Vixen and Arca-Swiss.