About this product
Part Number: 20236
Screws directly to the M56 thread on the Sky-Watcher 80ED telescope's focuser draw tube.
This Sky-Watcher 0.85x focal reducer/flattener is optimised for the Sky-Watcher Evostar 80ED PRO refractor.
Effectively reduces the telescope’s focal length by a factor of 0.85x to enable imaging at f6.37
Also provides much improved field-edge correction.
Use in conjunction with a DSLR-M48 Ring Adapter.
Can also be used with other similarly specified refractor telescopes when combined with our Astro Essentials Adapter.
Requires 55mm of back focus.
|Average Rating (2 Reviews): |What a difference - edge distortion
Saturday, 7 December 2019 | Lee
I expected this to cure the edge distortion I was seeing (even quite far in from the edges it was noticeable) but it still surprised me when I pulled the frames off the camera. An essential purchase on a larger sensor and I suspect a help on medium sized sensors too. There appeared to be an unusual amount of dusty white debris around & on the reducer in its Skywatcher box which was a little disconcerting, but some very gentle air blow and cleaning has got it looking clean and clear.
Best match for SkyWatcher ED80 doublet
Thursday, 14 March 2019 | Andrei
The flattener perfectly fits on my SkyWatcher ED80 doublet! The images are flat-flat! No stars comma, chromatic aberration or anything related to that.
At the moment I'm using it for imaging with a stock Canon EOS T3i/600D and I get the focus without any problem. However, wasn't able to find the focus with a ZWO ASI 120MM mono planetary camera, so I'm looking for some extenders. Correct spacing is critical.
I recommend you ask a few questions before you buy this - FLO support team is the best, as always!
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