In article
>In article <4rqd63$5oj@h20-hrze.uni-duisburg.de> martin@math.uni-duisburg.de >(Silvio Martin) writes:
> -> Hmm, with different lenses you can't compare the brightness of the
> -> finders for two reasons:
> -> 1. These lenses will have different f-stops at the focal lenght you > -> used.
> -> 2. Even if the lenses had the same f-stop some lenses are brighter than
> -> others.
>Can you please explain the last one for me: I don't get it: if a lens is
>f5.6 then should not every other lens with f5.6 give the same amount
>of light???
I can't explain it, but I can point out a good example of it: the non-AI
early 28mm f3.5 Nikkor looks mighty dim in a viewfinder, while the late
AI/AIS 28mm f3.5 Nikkor looks very bright, even to the corners, with the
same VF. Comparing the two lenses, the later version has a much larger
rear element (which may have something to do with it.......).
Hope This Helps