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Originally Posted by avandonk
Focal reducers work fine with the smaller sensors as the DSI. The field is to small to for field curvature or coma to be a problem. I would go so far to say that even a focal reduction of 0.5 which in your case would be 400mm at F2.0 would be fine. The 1 1/4" type focal reducers that screw into the 1 1/4" nosepiece of the DSI.
Bert
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wish there is a blockbuster for astro gear. really think it will do the trick? cos Bintel is really close to my house
