Flat61A Adjustable field flattener

Adjustable Flattener is made for use with the ZenithStar 61 telescope. It features a 45mm image circle for use with sensors as large as full frame, while also retaining your ZenithStar 61's native focal length! On the back, it features an M48 thread for attaching nearly any camera. 

Full frame size
• Designed with nearly Full frame chip-size DSLR cameras in mind.
• FMC tripllet APO design.
• Produced entirely with the best Ohara optical glasses.

• Adjustable design, for perfect back focus it can be used with other models of refractor
• 48mm filter ready

Superb Finish
• William Optics polished anodized finish.
• All internal surfaces threaded and blackened to prevent reflections.

Easy to Use
• Will accept any standard 48mm T-ring for your camera.

Suitable for
• GT71, GT81, Z103, Z126.