The William Optics UltraCat 108 steps up the original Redcat design for ultimate performance of aperture and light gathering power. With its compact optical design, WIFD internal focus design, and 5 Element Petzval design, sharp flat field images are at the astrophotographers fingertips! Coupled with its extremely fast f/4.8 focal ratio, deep sky is well within reach!

With a remarkable 60mm image circle, the William Optics UltraCat 108 WIFD can accomodate up to medium format sensors, making the scope well suitable with higher end cameras.

The patented internal focuser guarantees accurate, stable, and effortless imaging, preventing balance problems and removing vignetting.

With the built in sensor tilt, the camera sensor are already slightly tilted from the focal plane to reduce risk of Newton rings and other distortions.

• Lens Type: Petzval Design
• Focal Length: 518mm
• Aperture: 108mm
• Focal Ratio: f/4.8
• Image Circle 60mm up to Medium Format
• Flattener: 5 Element Petzval
• Focuser: WIFD Internal Focus Design, Compatible with EAF
• Lens Material: Super ED Glass x2 ED Glass x1 Lanthanum Glass x1 X-Element x1
• Camera Format Compatibility: Medium Format Full Frame APS-C M4/3
• T-Mounts Supported: Canon EF, RF, NIkon F, Z, Sony E, Pentax K, Micro Four Thirds, FUJI X
• Tube Length: 510.5-588.5mm
• OTA Weight: 17.53 lbs.