From what little I know a coma corrector for a Newtonian is the best piece of glass you can buy. My Newt has the ES HRCC in the focuser and it stays there no matter what fl is in the focuser...OK it comes out when I use my WO Binoviewers.
With the coma corrector the ES 30 82 is pinpoint edge to edge....is there anything much better than that????
Matt
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