Cloud Break Optics

FLAT6AIII special edition for Fluorostar 91

FLAT6AIII special edition for Fluorostar 91 - Main image
$226.2 $348 In stock

Category: Astrophotography Accessories

The FLAT6AIII special edition is a William Optics field flattener designed for use with the Fluorostar 91 telescope. It is listed under astrophotography accessories and carries the 6A and 6AIII tags along with the Fluorostar 91 designation.

  • Brand: William Optics
  • Product name: FLAT6AIII special edition for Fluorostar 91
  • Category: Astrophotography Accessories
  • SKU: Standard (P-FLAT6AIII-M92)
  • Intended pairing: Fluorostar 91 telescope
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Customer Reviews (5.0 / 5 · 5 reviews)

Ava C. ★★★★★

Finally got this attached to my Fluorostar 91 and the stars across the whole frame are perfectly round now. The machined aluminum ring feels solid and threads on smoothly.

Henry ★★★★★

It cleaned up the coma in my Fluorostar 91’s corners immediately—first shot with it and the stars looked like pinpricks across the whole frame. I’ve been fighting with edge distortion for months, and this accessory finally made those test shots usable without cropping.

Lucy C. ★★★★★

Finally got clear stars all the way to the edge of the frame with this flattener—my previous setup always left soft corners. The threads are butter-smooth and mate perfectly with the Fluorostar 91's focuser, no wobble at all.

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