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Message: <blockquote data-quote="Chosun Juan" data-source="post: 3332674" data-attributes="member: 92780">Yes, thanks Ed, I agree.  I meant that perhaps Tobias (inadvertently, or by omission) overly adjusted the photographs to reflect what he saw? (although the Swarovski Habicht 8x30 with it's reported ~96% transmission is still out of whack there). Your later suggestion to Tobias to mask the objectives down to a common exit pupil size of 2.5mm should do the trick along with calibrated lighting and manual camera settings, getting rid of any truncation and aperture effects.That taken care of, it still doesn't explain what he reported he saw visually ???  {"The 8x32 Ultravid at daylight used with closed pupil is visibly darker than the 8x42 Ultravid" .....}I find the first of his following two suggestions does not make sense  :h?:  .... and the second may just indeed be plausible.   :cat:Chosun  :gh:</blockquote>