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William Optics Flat4 0.8x Reducer Flattener
William Optics Flat4 0.8x Reducer Flattener
Product Description
This revolutionary new William Optics AFR-IV Adjustable Flattener / 0.8x Reducer was made for 500-1000mm refractors.
The Super-Transmission-Coated with 2-element lens system is designed and produced by William Optics, the inner flattener lenses can be set at the optimum 66mm-86mm back focus distance (Distance from flattener lens to film or CCD plane).
This high quality accessory is a must-have for 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
• 35mm 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 WO 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
• GT102, FLT98, FLT110, FLT132 and many others
Specifications
High-quality FMC |
Lens-to-chip distance : 66-86mm |
Power : 0.75x ~ 0.8x |
Rotating T-ring adapter |
Clear Aperture : 50mm |
L 84mm : W 77mm : H 123mm |
Weight : 540 g |
Backfocus distance recommendation
FLT 98 | 76.8 mm |
FLT 110 | 73.5 mm |
FLT 132 | 71.5 mm |
GT 102 | 76 mm |
M90 | 77.3 mm |