William Optics P-FLAT4 Flattener 4 - 0.8X Reducer

Article number: P-FLAT4
Availability: In stock


The revolutionary William Optics AFR-IV Adjustable Flattener and (0.75x-0.8x) reducer is made for 500 to 1000 mm refractors, including the William Optics FLT98, FLT110, FLT132, and others. This 2-element, 2-inch is black-anodized for durability and beauty. All internal surfaces are blackened to eliminate reflections.

The WO AFR-IV Flattener has a rotating t-ring thread that will accept any standard t-ring for your camera. The included T-ring adapter comes with a locking screw and extra retaining screws. This field flattener inserts directly into a 2-inch focuser. It is easy to set the optimum back focus distance...just twist.


William Optics AFR-IV Flattener Highlights:

  • The lens is designed to cover full size DSLR cameras with a clear lens aperture of 54 mm
  • The WO Flattener 4 has an excellent air-spaced doublet design with STM coatings, and is made with the best Ohara optical glass.
  • Superb William Optics anodized finish.
  • All internal surfaces are threaded and blackened.
  • Rotating T-ring thread for any 35 mm 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-inch focuser.
  • Lens-to-chip distance : 66-86 mm
  • 0.75x-0.8x Reducer
  • Rotating T-ring adapter
  • Clear Aperture : 54 mm
  • L 84 mm : W 95 mm : H 144 mm
  • Weight : 595 g
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