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Thread started 11 Jul 2007 (Wednesday) 15:04
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70-200 f4 non IS focus error

 
DaveG
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Location: Dartmouth, Nova Scotia
     
Jul 11, 2007 15:04 |  #1

A friend of mine has borrowed a 70-200 f4, the non IS version, from another friend and the lens is quite significantly back focusing. It's been sent to Canon Canada for repair but they can't find anything wrong. Canon Canada's competence is highly questionable, so their estimate doesn't mean a thing to me.

What I'd like to know is if this back focus problem is specific to this particular lens or have many other people had trouble with the 70-200 f4, and it's more of a generic production problem?


"There's never time to do it right. But there's always time to do it over."
Canon 5D, 50D; 16-35 f2.8L, 24-105 f4L IS, 50 f1.4, 100 f2.8 Macro, 70-200 f2.8L, 300mm f2.8L IS.

  
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khiromu
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Jul 11, 2007 15:53 |  #2

Could be the combination of the lens and the body. If you send both in, they can fix it. Personally, I have only had one focus problem, which was solved by Canon by sending in the lens alone...




  
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ed ­ rader
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Jul 11, 2007 17:35 |  #3

DaveG wrote in post #3526535 (external link)
A friend of mine has borrowed a 70-200 f4, the non IS version, from another friend and the lens is quite significantly back focusing. It's been sent to Canon Canada for repair but they can't find anything wrong. Canon Canada's competence is highly questionable, so their estimate doesn't mean a thing to me.

What I'd like to know is if this back focus problem is specific to this particular lens or have many other people had trouble with the 70-200 f4, and it's more of a generic production problem?

is the camera a rebel XT by any chance?

ed rader


http://instagram.com/e​draderphotography/ (external link)
5D4 x2, 16-35L F4 IS, 24-70L II, 70-200L F4 IS II, 100-400L II, 14L II, sigma 15 FE, sigma 28 f1.4 art, tc 1.4 III, 430exII, gitzo 3542L + markins Q20, gitzo GT 1545T + markins Q3T, gitzo GM4562

  
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DaveG
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Jul 12, 2007 10:54 |  #4

ed rader wrote in post #3527478 (external link)
is the camera a rebel XT by any chance?

ed rader

No it's a 10D, a 20D and a 5D.


"There's never time to do it right. But there's always time to do it over."
Canon 5D, 50D; 16-35 f2.8L, 24-105 f4L IS, 50 f1.4, 100 f2.8 Macro, 70-200 f2.8L, 300mm f2.8L IS.

  
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70-200 f4 non IS focus error
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