About this product
This Focal Reducer is designed for use with the Askar FRA400 Astrograph, the new Askar FRA400 f/3.9 full-frame focal reducer reduces the effective focal ratio by a factor of 0.7x, taking this already fast f/5.6 scope down to a f/3.9 system with 280mm focal length.
That means a wider field of view and a greatly reduced exposure time, making it easier to capture wide-field images of large deep-sky objects. The reducer has a back focus of 55mm and includes threads for M48X0.75 (2") filters.
|Average Rating (1 Review): |Only managed 2 test shots but...
Monday, 13 September 2021 | Andrew
As usual it was deliverd promptand well packaged, thanks FLO. Could only take 2 test subs as I had other problems with my rig but those 2 subs show good stars nearly all the way to the edge. I may need to adjust my spacing for it to be perfect but Im very impressed with this bit of kit.
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