Quote:
Originally Posted by multiweb
Last question - QE(Ha). For the QHY9 the curve with microlens says ~45% @ 650nm so I enter 0.45 in that cell right?
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Yep. No special reason why I used the QE for Ha except that I seem to capture it frequently
It would also make sense to put in an average QE over the visible range but it's tougher to estimate.
Quote:
Originally Posted by multiweb
PS: central obstruction by area or diameter?
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By diameter like what is normally quoted in specs, e.g. 45% obstruction would be 0.45.