17-40 F4 focus beyond infinity mark


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jimtong

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May 8, 2002
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#1
Hi owner of 17-40L F4. Does your lens distance scale focus beyond infinity mark when you focus on far subject? Mine does, it even goes beyond the infra red index marking.

Thanks.
 

mpenza

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Jan 18, 2002
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#2
the lens scale is calibrated at a certain temperature. at different temperatures, there would be slight displacement....
 

jimtong

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May 8, 2002
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jimmyto.ng
#3
mpenza said:
the lens scale is calibrated at a certain temperature. at different temperatures, there would be slight displacement....
but mine is not a slight displacement.. it is always going beyond the infinity mark in normal room temp.
 

jimtong

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May 8, 2002
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#4
Called Canon and was told that it is not possible for the distance scale to go beyond the infinity mark. Looks like I got to bring the lens down for a checkup.
 

sequitur

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Apr 17, 2003
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#5
i guess if it's affecting the focus of your photos then you should send it in for a checkup.

after all canon is pretty effective you should get back your stuff in 1-2 days.
 

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