Archived posting to the Leica Users Group, 2004/01/25

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Subject: Re: [Leica] Re: R lenses on Canon bodies
From: Eric Welch <eric@jphotog.com>
Date: Sun, 25 Jan 2004 22:16:00 -0800
References: <97E8708C-4F88-11D8-8352-000393778554@netvigator.com> <0C600344-4F91-11D8-AEC2-000A958F513A@jphotog.com> <3C2F0096-4FA4-11D8-B824-0050E42E6E0B@shaw.ca> <26F7F6EE-4FAF-11D8-AEC2-000A958F513A@jphotog.com> <28D55016-4FB3-11D8-BB05-0050E42E6E0B@shaw.ca> <E835B60A-4FB8-11D8-AEC2-000A958F513A@jphotog.com> <72AA416E-4FBD-11D8-9CC3-0050E42E6E0B@shaw.ca>

What could that have to do with it? The mechanical connections 
abandoned with the FD lenses were replaced by electronic ones in the 
EOS lenses - focal length, aperture and other data. What does that have 
to do with imaging and uneven exposure?

Software workarounds for lenses? Then why would one Leica lens exhibit 
such a problem and not all of them, since there's no "mechanical" 
connection with any of them?

Do these workarounds you're talking about deal with fall-off, 
compensating for lenses based on the response of sensors to light in a 
given area (which varies with each lens). I would think the 35 Summilux 
R would probably show such fall-off when used wide open in bright 
light. Anyone try that one?

Eric
Carlsbad, CA

"The theory of a free press is that truth will emerge from free 
discussion, not that it will be presented perfectly and instantly in 
any one account."

- -- Walter Lippmann 
On Jan 25, 2004, at 9:06 PM, John Collier wrote:

> There are no mechanical connections on EOS lenses.

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Replies: Reply from John Collier <jbcollier@shaw.ca> (Re: [Leica] Re: R lenses on Canon bodies)
In reply to: Message from Howard Cummer <cummer@netvigator.com> ([Leica] Re: R lenses on Canon bodies)
Message from Eric Welch <eric@jphotog.com> (Re: [Leica] Re: R lenses on Canon bodies)
Message from John Collier <jbcollier@shaw.ca> (Re: [Leica] Re: R lenses on Canon bodies)
Message from Eric Welch <eric@jphotog.com> (Re: [Leica] Re: R lenses on Canon bodies)
Message from John Collier <jbcollier@shaw.ca> (Re: [Leica] Re: R lenses on Canon bodies)
Message from Eric Welch <eric@jphotog.com> (Re: [Leica] Re: R lenses on Canon bodies)
Message from John Collier <jbcollier@shaw.ca> (Re: [Leica] Re: R lenses on Canon bodies)