William Optics Adjustable Flattener for FLT132, GT102, GT153
 William Optics Adjustable Flattener for FLT132, GT102, GT153William Optics Adjustable Flattener for FLT132, GT102, GT153 

William Optics Adjustable Flattener for FLT132, GT102, GT153

  (1 Review)
✓ 2 year warranty


1x in stock shipped 1-2 working days

About this product

Model:  wo-flat68III
Part Number:  P-FLAT68III

New William Optics Flattener 68III

This revolutionary new WO FF68III Adjustable Flattener was made for 6 -7.5 F ratio refractors and has been engineered and CNC machined for usage with our FLT 132, 102GTS and other APO refractors. This accessory is a must-have for refractor astrophotography.


  • Designed to cover full size 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.
  • Flattener Power: 1x (no reduction).
  • 45mm for full illuminated imaging circle.

Superb Finish

  • Superb William Optics anodized finish.
  • All internal surfaces threaded and blackened for no reflections.
  • Protecting covers are included on both sides.

Easy to Use 

  • Will accept any standard T-ring for your camera (thread size M48x0.75).
  • Suitable for FLT 132, 102GTS (with 3" focuser) and many other refractors with focuser M92x1.0 threads.

Flattener Adjustment Distances

102 GTS 13.6mm
FLT 132 7.7mm
Z126 3.0mm


Customer reviews

Average Rating (1 Review):  
Write a Review and share your opinions!

Rating (max 5):  
Williams adjustable flattener for 132
Wednesday, 6 May 2020  | 

Excellent, less vignetting, rounder sharper stars than all other flatteners I have use with other telescopes and flatteners. Again along with the whole industry astronomical industry some important innovations are glossed over or buried. So question can you include a filter within this flattener. and the answer is yes. An excellent flattener, particularly if you do one shot colour astro photographer and require a single light pollution or other filter. Expensive but makes imaging through this flattener and setting up is simple and quick.


Please fill in the form below to ask a question.


Related Products
William Optics FLT 132 2020 - Checked & Tuned

Covid-19: We are open for business as usual. Some deliveries are a little delayed. All deliveries are contact free. Thank-you for choosing FLO 🙂