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RE: [OM] Retro focus?

Subject: RE: [OM] Retro focus?
From: "Wayne Harridge" <wayneharridge@xxxxxxxxxxxxxxx>
Date: Mon, 9 Dec 2002 20:58:33 +1100
> 
> Also, may be due to the close film to rear lens distance, the 
> edge fall off looks to be more serious than the SLR. Haven't 
> pay with any range finder super wide, just impressed by some 
> Leica 21mm slides and some C/V 15mm prints, the vignetting 
> was very obvious.
> 

Yeah cos^4 fall off will be more severe for a non-retro focus design as
the retro focus design puts the lens rear nodal point much further away
from the film, so the angle between the lens axis and the edges of the
frame is much less.

...Wayne



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