This revolutionary new WO AFR-IV Adjustable Flattener was made for 500-1000mm refractors.
Super-Transmission-Coated with 2-element unit was designed and produced by William Optics, the inner flattener lenses can be set at the optimum 66mm-86mm back focus by simple hand twist (Distance from flattener lens to film or CCD plane).
This accessory is a must-have for refractor astrophotography.
Lens
• Designed to cover full size DSLR cameras with clear lens aperture of 54 mm
• STM coated with excellent doublet air spaced design.
• Produced entirely with the best Ohara optical glasses.
Amazing
• It will flatten the field amazingly well and finally make you see those stars round!
• This unique flattener works with WO's or other 500-1000mm focal length refractors.
Superb Finish
• Superb William Optics anodized finish.
• All internal surfaces threaded and blackened for no reflections.
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
• M90, FLT98, FLT110, FLT132 and many others.
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