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Message: <blockquote data-quote="Chosun Juan" data-source="post: 3332178" data-attributes="member: 92780">CF, The brightness per se' should not be affected by the baffling, unless as Mark says the truncating of the exit pupil is due to that and the eye's pupil is at 4mm and thus the transmitted area is affected. The truncation is rather more likely in concert with other causes like prisms, field stops, alignment, etc, which should not affect the absolute centre say 2mm.  I think it's always hard to get an accurate photograph of both exit pupils at the same time unless using a powerful telephoto set-up at great distance to approximate the parallel lightpaths. |8.|   One at a time might give a better representation of any truncation the eye would see in actual use.   Certainly if the eye's pupil is at 4mm then the truncation shown (due to whatever cause) would indeed reduce the brightness. Contrast and colour reproduction will be independent of brightness on a transmitted level (user perceptions and preference might be another matter though). I was not aware that the x42mm UVHD+ colour reproduction needed 'improving'? in the the 32mm - in fact from all reports the 42mm has done quite nicely having a lively 'sparkle' to the view.  I also think it's a bit OTT to describe Swarovski's design compromise choices as "horrible"  "mistakes", especially given the ER and ease of view benefits which the little Leica can't even get close to looking at (just ask Beth!      :-C     ).What interested me was Tobias's comment that "The 8x32 Ultravid at daylight used with closed pupil is visibly darker than the 8x42 Ultravid" ..... once the eye's pupil is constricted below say 3.5mm to cut out any truncation effects then the brightness should be pretty similar if not greater in the smaller 32mm.  His observations seem to be backed up by the grey scale photographs comparing the two formats.  :h?:Thoughts people, on this brightness thingo ?? .......  :cat: Chosun  :gh:</blockquote>

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