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Originally Posted by Scoper
I'm also not bothered by lack of edge of field sharpness provided it is not gross; the on-axis image is what counts for me.
Well that's my quidsworth
Cheers to all
Malcolm
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Malcolm,
This is a very good point. I think far too many people place too much emphasis on sharpness right to the EOF. This is particularly so of new observers who take one look through a Nagler, for the first time, with it's 82 deg AFOV and usually sharp right to the edge and become mesmerised and spellbound by it's wide flat field. Consequently they do not pay enough attention to other important issues concerning eyepiece performance, particularly what's going on "straight up the guts".
CS-John B