Archived posting to the Leica Users Group, 2006/01/10

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Subject: [Leica] Canon 5D + Leica Lens Exposure Question
From: red735i at earthlink.net (Frank Filippone)
Date: Tue Jan 10 11:24:59 2006
 
Thanks Doug......
Interesting, complicated, and locks the lens decision to Canon.... or the
easy way is Canon

Frank Filippone
red735i@earthlink.net


>So what does the Canon Chip in the Canon lens do that the Leica lens in
>Aperture preferred AE mode does not do?  It would seem that maybe the chip
>or does something to denote the possible dynamic range of the lens....


It has to do with the viewscreen (which the meter reads) which is optimized
for maximum brightness and as an incidental consequence doesn't pass light
recieved from the lens along a linear response function.  The lens and
camera have to communicate to hit the correct points on the curve.


Doug Herr
In reply to: Message from telyt at earthlink.net (Douglas Herr) ([Leica] Canon 5D + Leica Lens Exposure Question)