Archived posting to the Leica Users Group, 2008/03/19

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Subject: [Leica] Canon DSLR R lens use/exposure inconsistencies
From: red735i at (Frank Filippone)
Date: Wed Mar 19 07:09:25 2008
References: <> <0JXY003FYE359X20@l-daemon> <> <>

This kind of "friendliness" really amazes me.  The camera has a digital
processor heart.  Wouldn't it be easy to throw in a programmable curve
feature?  But then, you could use brand N or L lenses on your Canon body,
and starve the company of revenue.....

The other choice is to use an adapter which has this compensation code built
into it.... if the lens chip contains the code and the maker is smart enough
to figure out how to program it.

The real fix is the R10.

Frank Filippone

When a Canon EF lens is mounted to an EOS camera, a 
variable  exposure compensation factor (a program curve, not just a 
fixed compensation factor) for this phenomenon is fed through the system 
in order to provide correct metering for all apertures. However, when 
using a non-coupled manual diaphragm lens as you describe, no such 
communication takes place, so the responsibility for exposure 
compensation reverts to you. 

In reply to: Message from grduprey at ( ([Leica] Canon DSLR R lens use)
Message from tedgrant at (Ted Grant) ([Leica] Canon DSLR R lens use)
Message from simon.apekop at (simon jessurun) ([Leica] Canon DSLR R lens use)
Message from at (Douglas Sharp) ([Leica] Canon DSLR R lens use/exposure inconsistencies)