Archived posting to the Leica Users Group, 2002/08/28

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Subject: Re: [Leica] 13% or 23% ?
From: Dan C <leicaman@sympatico.ca>
Date: Wed, 28 Aug 2002 14:38:02 -0400
References: <200208281601.JAA28633@mejac.palo-alto.ca.us>

Don't forget, the viewfinder only shows part of what will show up on film.

dan c.

At 02:21 PM 28-08-02 -0400, Mark J. Rosen wrote:
>Emanuel,
>
>He he he.  Yeah, I'm not worrying too much about it, but when I read a
>manual I don't expect such a large inconsistency.
>
>Chris,
>
>Yeah, you're right.  I measured and clearly the white spot is in fact 12mm.
>It's on the curtain right in front of the film plane, so I don't buy the
>idea that somehow its distance from the film plane makes any difference at
>all.  Instead, it seems to me that the manual must be correct when it states
>that the spot is 13% of the negative size, and 12mm in diamter, and
>incorrect when it states that the meter field is 23%, or 2/3 of the short
>distance, of the bright line field corresponding to the lens in use.  Simple
>arithmetic yields the straightforward result that the spot only occupies 13%
>of the rectangular cross section of light reaching the film, i.e., a 24x36mm
>rectangle.  
[snip]
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Replies: Reply from Christer Almqvist <chris@almqvist.net> (Re: [Leica] 13% or 23% ?)
Reply from Dan C <leicaman@sympatico.ca> (Re: [Leica] 13% or 23% ?)