Quote:
Originally Posted by gregbradley
I was under the impression, from a thread somewhere, that Roland works to .99 strehl as a standard for his scopes.
Greg.
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The cut-off figures I've heard are AP 0.97 and Zeiss 0.94
Roland is a little coy on this
There are some excellent essays and images here:
http://geogdata.csun.edu/~voltaire/roland/index.html