Quote:
Originally Posted by JJDOBBER79
AG, I am using a f5 12" lightbridge
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I've used the Tele Vue plossls at f5 and find them very satisfying. I think your position of using a 20mm plossl (so retaining good ER) and barlowing it is a good one. At f5 I personally struggle to find a good EP without considerable field curvature over 20-25mm focal length without a paracorr.