This revolutionary new William Optics FF68II Adjustable Flattener was made for 6 -7.5 F ratio refractors.
This accessory is a must-have for refractor astrophotography.
Lens:
- Designed to cover full size DSLR cameras with clear lens aperture of 50mm
- STM coated with an excellent doublet air spaced design
- Produced entirely with the best Ohara optical glasses
- Flattener Power: 1x (no reduction)
- 45mm for full illuminated imaging circle
Amazing:
- It will flatten the field amazingly well and finally make you see those stars round!
- This unique flattener works with WO or other 6-7.5 F ratio refractors.
Superb Finish:
- Superb William Optics anodized finish
- All internal surfaces threaded and blackened for no reflections
- Protecting covers are included on both sides.
Easy to Use:
- Will accept any standard T-ring for your camera (thread size M48x0.75)
- Suitable for FLT98, FLT110, FLT132, GT102 (with 3” focuser) and many others refractors with focuser M92x1.0 thread.
See the diagram for the connection specification.
