The flagship: 108mm Petzval for full frame
The William Optics UltraCat 108 WIFD is made for those who take their astrophotography to the highest level. The 108 mm Petzval optics provide a bright image across the entire frame, with no edge distortion and no separate flattener. Faster, simpler, and consistently beautiful shots.
Big light, full control
With a 518mm focal length at f/4.8, the UltraCat 108 combines serious imaging scale with short exposures: from medium-sized nebulae to galaxy clusters. The included rotator and tilt lens provide full control over composition and sensor alignment, and the internal WIFD focuser carries heavy camera setups without shifting. The Bahtinov mask is integrated.
In the box
- UltraCat 108/518 Optical Tube with WIFD Focuser and Petzval Corrector
- Rotator
- Candelabra
- Bahtinov mask
- Vixen-Style dovetail
Featured accessories
A William Optics UniGuide 50mm Guidescope (from 189 euros) is the fitting guide for this class. The M48 and M54 connectors directly accept common William Optics camera adapters.
For whom yes, for whom no
For: advanced astrophotographers looking for a full-frame flagship with all the bells and whistles, on a sturdy equatorial mount. Not: for those who shoot mobile or on a star tracker; the Cat 51- and 71-class are built for that.
Specifications
| Optical design | Apochromat, Petzval with integrated corrector |
| Opening | 108 mm |
| Focal length | 518 mm |
| Opening ratio | f/4,8 |
| Focuser | WIFD (intern) |
| Rotator and tilt flange | Included |
| Field of view | Flat to full-frame |
| Attachment | Vixen-Style dovetail |
| Execution | OTA (loose tube) |
Unsure about the right tube for your camera and mount? The telescope selection aid helps you choose. Also view all Refracting telescopes and the full range of William Optics.
Reviews
There are no reviews yet.