Archived posting to the Leica Users Group, 1998/01/22

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Subject: Re: [Leica] Re: shift bellows
From: Donal Philby <donalphilby@earthlink.net>
Date: Thu, 22 Jan 1998 10:13:26 -0800

CHKARNES wrote:
> 
> In a message dated 98-01-21 23:47:51 EST, you write:
> 
> <<
>  At 09:22 AM 1/20/98 +0000, you wrote:
>  >Hama makes a 35 mm bellows that is in fact a mini view camera with full
>  >movements and scales, can be adapted to any camera, great for product
>  >photography with a 135/150mm enlarging lens. It is rather expensive.
>   >>
> 
> How can a lens that is designed to cover a 24x36mm format possibly cover that
> format when it is tilted and swung?
> Charlie

If you think about the cone of light from the back of the lens just
filling the frame of film, then imagine the lens farther away as it
would be on a bellows, the cone of light gets larger, but of course you
lose light according to the inverse square law.

donal
- -- 
Donal Philby
San Diego
http://www.donalphilby.com