I have heard of back focusing but side focusing?!?

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lukewoodford

FYI, I am Luke Woodford.....by Luke Woodford
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Luke Woodford
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This is strange, let me start by saying my 24-70 is kind of broken. My tripod toppled over with it on a couple weeks ago. It works but is stuck at 24mm. I'm currently waiting to hear back from the insurance. Anyway I was doing some group shots at weddings with it an I noticed at f/2.8 it's alot sharper on the left than the right. I have never heard of this beofre. Does anyone know the cause of it? If my lens is broken what is it that is causing this? I'm baffled :thinking:

Cheers,

Luke
 
Its called "de-centering", and actually its a very common fault (especially after a drop!), but many lenses actually come out of the factory de-centered.

Essentially lens elements should all be aligned but often alignment is a fraction of a millimeter out on one or another side - this problem is quite common, and is often more visible at certain focus distances as lens elements move around in the lens.
 
puddleduck said:
Its called "de-centering", and actually its a very common fault (especially after a drop!), but many lenses actually come out of the factory de-centered.

Essentially lens elements should all be aligned but often alignment is a fraction of a millimeter out on one or another side - this problem is quite common, and is often more visible at certain focus distances as lens elements move around in the lens.
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ok mate, thanks for that. Is there somehting in camera I can do to correct it or just put up with it until it's repaired?
 
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