Posted: Tue Sep 08, 2020 2:23 pm Post subject: informative and useful |
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paulhofseth wrote:
SIrs,
The tests done by Stephan K. are most informative and useful when considering what to expect from an intact optic (in contrast to one that has been cleaned and reassembled by a well meaning mechanic). The pictures illustrate quality more easily understood than merely examining MTFgraphs athough both methods may mislead due to field curvature effects which may be disregarded depending on subject-matter.
All respect for the lengthy task of ensuring fairly comparable snaps of real-life subjects.
p. |