OTA · MSRP $5,398
William Optics Ultra-Cat 131
Key specifications
| Aperture | 131 mm |
|---|---|
| Focal length | 648 mm |
| Focal ratio | f/4.9 |
| Optical design | Other |
| Weight | 11.3 kg |
All specifications
| Focuser type | WIFD rack-and-pinion, EAF compatible, 0-20 mm travel |
|---|---|
| Tube length | 650 mm |
| Dovetail | Losmandy |
About
A 131 mm f/4.9 five-element advanced Petzval astrograph needing no flattener, covering a 60 mm image circle. Built on the WIFD rack-and-pinion focuser with the STX-R sensor-tilt adjuster and rotator, on a Losmandy dovetail, with M68, M54 and M48 camera adapters supplied.