[OM] Re: E-1 craving

[Chuck Norcutt]

Ooops!  I forgot that eyepiece f/stop part.  Maybe that's the answer.

Chuck Norcutt

AG Schnozz wrote:

>>I got the f/stops is f/stops part.  That has to do with the
>>surface brightness on any given area of the film and screen. 
>>The mystery was why the eyepiece brightness is not higher for
>>the larger format. 
>>Presumably the image magnficication through the eyepiece is
>>less for the larger format and should appear brighter?
> 
> 
> Because the viewfinder eyepiece is a lens with an F/stop too. 
> Some cameras have bigger eyepieces (larger apertures) than
> others.  All have different magnifications.  If you increase the
> magnification AND the aperture, you can maintain the same
> apparant brightness while increasing the magification.



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