Sometimes with DSLRs and older Canon lenses, the lack of extra coatings on the 
lens can cause focus issues. Canon is aware of this in some instances and I 
know several people who have had this with older 24-70mm L lenses. Check the 
back of yours. If it has a rectangular opening it is newer and modified for use 
with newer Digital SLRs. The 135mm F2 has never been updated to my knowledge. 
If you are having focus issues, sometimes the lens/camera combination needs to 
be calibrated. Canon does do this but you have to send both in to a repair 
facility.

Peter K

----- Original Message ----
From: Steve Parrott <[EMAIL PROTECTED]>
To: [email protected]
Sent: Saturday, March 10, 2007 6:59:26 AM
Subject: Re: EOS EF 135mm f/2L

I have this lens, but have mixed feelings about it. I actually have 
become somewhat afraid to use it. EVERY time I have used it for indoor 
studio portraits, I ALWAYS have some shots that are out of focus. I do 
not shoot any larger than 5.6, many times using 8.0. I manually select 
my focus point, and place it directly on the person's eye. I use a 1Ds 
by the way. When the photos are in focus, they are great, but as I 
said, there are always going to be at least two that are out of focus. 
I never have this problem using my 24 - 70 2.8 L, or any other lens. It 
is only when I use the 135 2.0 that I have some focus issues. So I am 
thinking there is some kind of intermittent focus issue with this 
particular lens.

Steve






 
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