Could anyone explain why "about 4 stops of falloff at ghe edges" ?

Ric


----- Original Message ----- 
From: "Stewart C. Russell" <scr...@sympatico.ca>
To: <pinhole-discussion@p at ???????>
Sent: Tuesday, June 24, 2003 8:53 AM
Subject: Re: [pinhole-discussion] coverage


> George L Smyth wrote:
> > 
> > You can figure on about 120 degrees of coverage.
> 
> hmm, so that means I could have a 10.4mm focal length, with about 4 
> stops of falloff at the edges, on a 36x24 frame. Hmm, now how to mount 
> this thing inside my rangefinder ...
> 
> cheers,
>   Stewart
> 
> 
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