This revolutionary new William Optics Adjustable Flattener 68II is made for refractor of focal ratio f/6 – f/7.5.

This high-quality flattener has been engineered and CNC machined for usage with our FLT 98, 110, 132, GT102 and other APO refractors.

This high quality accessory is a must-have for advanced refractor astrophotography.

High quality reducer for serious astrophotographers

• Designed to cover full format DSLR cameras with clear lens aperture of 50 mm
• STM coated with an excellent doublet air spaced design
• Produced entirely with the best Ohara optical glasses from Japan
• 1.0x flattener power (no reduction)
• 45mm for fully illuminated imaging circle

Great performance and versatility

• It will flatten the field amazingly well and finally make you see those stars round edge to edge
• This unique flattener works with William Optics or other brands of refractors of focal ratio f/6 – f/7.5

Superb Finish

• Superb William Optics anodized finish
• All internal surfaces threaded and blackened for no reflections
• Protection caps provided on both sides

Easy to Use 

• Rotating T-ring thread for any 35mm camera. The T-ring adapter is provided with a lock screw and extra lock retaining screws
• Will accept any standard T-ring for your camera
• Inserts directly into 2" focuser

Suitable for
• GT102, FLT98, FLT110, FLT132 and many others

Specifications

 Backfocus distance recommendation