William Optics Flattener/ 0.8x Reducer for GT102 APO Refractor
This reducer/ field flattener is built to be used with William Optics GT102 APO refractor telescopes. Effectively reduces the focal length of these telescopes by a factor of 0.8x. Includes Canon EOS T-mount.
- Additional Information
SKU WO-P-FLAT6A-102 Manufacturer William Optics Barrel Size Thread-on Warranty 2 Year Warranty
- Included Items
- William Optics APO Flattener/ 0.8x Reducer for GT102 Refractors
- Canon EOS T-mount.
- 102mm Spacer
- Questions & Answers
Product QuestionsHello, will this be appropriate for a Lunt 102mm f/7 refractor, and will its field illuminate the full-frame sensor in a Canon 6D?Question by: Steven Fahey on Oct 16, 2016 5:54:00 PMYes and no. The field flattener is a very good match for the scope you want to use it on, but it will not quite illuminate the entire sensor due to the T-thread output. You should get excellent illumination over about 90% of the sensor, though, and you will need to shoot flats or crop to correct the corners.Answer by: Chris Hendren on Oct 30, 2016 3:37:00 PMQuestion by: TURKI alamri on Feb 12, 2017 4:28:00 AMQuestion by: berchan on Aug 4, 2014 8:55:21 AMThe spacing on this focal reducer is set for the GT102 102mm f/6.9 scope. It will probably be over-corrected on a 111mm f/7 scope unless you can reduce the spacing slightly (move the camera a couple mm closer to the sensor than the standard 55mm). This will be difficult with DSLR cameras but possible with most CCD cameras.Answer by: Chris (Admin) on Aug 5, 2014 12:40:03 PM
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