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Astrophotography > Optical accessories > Flatteners, Correctors, Reducers > William Optics > William Optics 2" Type IV field flattener, 0.8X
Product no.: 15549

2" Type IV field flattener, 0.8X

RRP: $ 482.00 Our price:
$ 428.00 incl. VAT, plus shipping costs
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Product description

This revolutionary new William Optics AFR-IV Adjustable Flattener and (0.75x-0.8x reducer) 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 50mm.
  • STM coated with excellent doublet air spaced design.
  • Produced entirely with the best Ohara optical glasses.
  • 35mm for full illuminated imaging circle.

Amazing:

  • It will flatten the field amazingly well and finally make you see those stars round!
  • This unique flattener/reducer works with William Optics or other 500-1000mm focal length refractors.

Superb:

  • 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.

Specifications

Capacity


Connection (to the telescope)
2"
Connector (at camera end)
T2 (M42 x 0,75)
Extension of focal length
0,8
Coating of optical system
multiple
Appropriate for...
Megrez 90, FLT 98, FLT 110, FLT 132
Focal length reduction
-
Self-focal length (mm)
-
Usable for visual observation
no
Optical length (mm)
66 - 86

General


Weight (g)
540
Colour
black
William Optics 2" Type IV field flattener, 0.8X
William Optics 2" Type IV field flattener, 0.8X

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