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

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Subject: [Leica] Canon DSLR R lens use
From: nathan at (Nathan Wajsman)
Date: Wed Mar 19 00:32:02 2008
References: <> <BLU121-W4848EA4CF0E06EF6B62A35D4060@phx.gbl> <00ea01c88965$0f155e60$2d401b20$@net>

Again, I guess people's experiences may vary, but I have not  
experienced the problems being discussed with my 100mm Apo Macro,  
neither on Canon nor on Olympus DSLRs.


On 19-mrt-2008, at 3:00, Frank Filippone wrote:

> It sounds like the metering still thinks there is a Canon lens on  
> it, which
> has an aperture the camera can change on command.
> Not true with the Leica lenses..... the aperture is manual and the  
> camera
> can not adjust it.
> How to fix it?  Ask someone that has one.....
> Frank Filippone
> Gene.
> Yep there are exposure problems.  I have 6 Leica lenses and all  
> give the
> correct exposure on my Canon XTi at full aperature, but when I stop  
> the lens
> down, they all tend to over-expose.  The more I stop down, the more
> over-exposure I get.  I see this in both manual mode and with AE  
> mode.  It
> does not matter if the lens is 2, 2.8 or 4 wide open.  they all  
> give the
> correct exposure wide open.
> I have tried them on my friends 20D with the same results.  David  
> Young
> reports the same thing with is Olympus E3 and I think with his  
> Canon 40D
> before that.  So, there is someting going on that needs to be  
> compensated
> for.  The problem is that it is not a simple -.3 setting or something
> because the difference increases the more you stop down.  That is  
> why I only
> use my Leica lenses on my Canon for shots that I can take the time  
> and view
> and make changes when needed.
> The focus confirmation part works out quite well.  And the 24mm  
> makes some
> quite nice photos on the Canon.
> _______________________________________________
> Leica Users Group.
> See for more information

Nathan Wajsman
General photography:

In reply to: Message from leicar at (Aram Langhans) ([Leica] Canon DSLR R lens use)
Message from red735i at (Frank Filippone) ([Leica] Canon DSLR R lens use)