Quote:
Originally Posted by Dave882
I’ve used a celestron 0.63x on a c8 and results are pretty decent (but I wouldn’t say an entirely 100% flat field). The spacing is critical for imaging and while i aim for about 105mm some report slightly different depending on the age of the reducer.
Also - shat size camera sensor are you using? I use a 4/3” asi294 which I feel is right on or just above the upper limit that it can handle. A smaller sensor will give a better flatter result.
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Yeah I’m using the same sized sensor on a 1600mm which makes me think I’ve got something gravely wrong. My spacing is approx 110mm as the oag caused some issues. I’ve since done away with it and waiting on a clear night to do subs from 80mm to find the sweet spot.
Glad to hear the curvature isn’t meant to be this bad, user error is a best case scenario.