Posted Thu Apr 18, 2013 6:36AM
I have this lens for just over 2 years, it was used with care, mostly in studio, but now I have the problem with focus like in the video
do/did you have tihs problem? how did you solve it? only taking it to the repair center is the solution?
Posted Thu Apr 18, 2013 7:03AM
I've had mine (I think) longer than 2 years and I haven't seen anything like that. If it is acting like the one in the video, I would say it clearly needs to be repaired. (It was hard to tell what was going on with the AF in the video because you don't know what the lens "was seeing", however, the slipping manual focus is clearly not proper).
Posted Thu Apr 18, 2013 7:45AM
Take it to repair, pronto! its not working.
Posted Thu Apr 18, 2013 7:59AM
The canon service in my country is not so reliable, so I am very very afraid.
The problem consists in not focusing properly in closer range - it seems to try but nothing happens - even in manual mode same problem. And also when I try to shoot upwards - like a tree top for example. When I use it downwards it focuses fine
I am very disapointed - I thought L lenses were better build but no luck
Edit: sorry for my English
(Edited on 2013-04-18 08:01:15 by narcisa)
Posted Thu Apr 18, 2013 8:05AM
me again: this is from DPREVIEW, it explains better than me
I have a bad copy ((((((((((((((((((
The canon 70-200 f4 IS lens is an excellent lens. However, recenlty there is a known problem with the quality of the focus module. The problem exists even for new purchased copy.
The lens has no problem to focus when the lens is in horizontal position. However, if your try to focus in the vertical position, there may be a problem.
It is very easy to verify if your copy has the problem.
1) put your lens in horizontal position.
a) watch the distance marking while turning the manual focus ring
b) there should be no problem when focusing from 1.2m to infinity and from infinity to 1.2m
2) now try to put your lens in vertical position, i.e. pointing the lens to the sky
a) there should be no problem when focusing from 1.2m to infinity
b) however, there may be problem when focusing from infinity to 1.2m
c) you may have to turn the focus ring quick to locate the problem
d) somewhere between infinity to 1.2m, there are a couple of distances that the distance marking will stop moving while you are turning the focus ring.
There are already quite a no. users returning the lens to Canon for repair. If your lens is still under warranty, you are lucky! Otherwise you have to pay a fortune to replace the focus module including the usm!!!
I think Canon should recall the batch of lens that have this problem for free repair.
Posted Tue Apr 23, 2013 12:32AM
ok, I sent the lense to service - hope for the best!
Posted Tue Apr 23, 2013 3:17AM
That's terrible, to have a problem like that with a batch of such expensive lenses. Hope they can sort it out for you. And I assume it's a free fix, yes?
(Edited on 2013-04-23 03:18:12 by kelvinjay)
Posted Tue Apr 23, 2013 1:39PM
so far no
Posted Tue Apr 23, 2013 9:24PM
I'd get it fixed sell it and get another one