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Cyclops Optics

William Optics Flattener 68-II


William Optics Flattener 68-II

Shipping Weight:
0.80 KGS

Product Description

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


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








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