Take your photography to the next level and beyond...

  • NEWS
  • REVIEWS
  • INSPIRATION
  • COMMUNITY
  • COMPETITIONS

Why not join for free today?

Join for Free

Your total photography experience starts here


Get on1's Perfect Effects 9.5 for FREE! (£48 value)

Problem with Canon EF 70-200 f/2.8 IS USM Lens


maclarens 11 19 Scotland
23 Sep 2011 8:48AM
Back in June I started getting an error message when using this lens indicating I needed to clean the contacts. I'd take several shots then the error message would appear and I'd switch the camera on/off and was able to continue shooting. Since June the problem has got worse despite several attempts at cleaning the contacts which to be honest seem perfectly clean. I also noticed that even when I was able to take photographs, some would appear grossly over exposed. I've tried the lens with a 5D Mk II and 7D bodies and got the same problem, although updating the firmware to the latest version seemed to solve it for a while. On an old 5D body I got no problem, until this morning. It seems to have packed up altogether.

Just wondered if anyone had had a similar experience and knew what the problem might be and if it can be repaired. My suspicion is that the lens contacts are fine and that the problem might be related to the aperture fins... the grossly over exposed images would seem to indicate the lens was not stopping down occasionally.

Join ePHOTOzine for free and remove these adverts.

User_Removed 11 3.3k 4 United Kingdom
23 Sep 2011 11:37AM
There's several things it could be and only a repairer would be able to find out exactly which. I recommend shipping it to Fixation for an estimate. What have you cleaned the contacts with and did you clean camera contacts too? Best thing is one of these but you have to be careful that you don't let dust from it fall into the lens or camera body.
ElSid 7 8 United Kingdom
23 Sep 2011 4:08PM

Quote:I also noticed that even when I was able to take photographs, some would appear grossly over exposed. I've tried the lens with a 5D Mk II and 7D bodies and got the same problem, although updating the firmware to the latest version seemed to solve it for a while. On an old 5D body I got no problem, until this morning. It seems to have packed up altogether.




Did the error specify dirty contacts or was it the ubiquitous Err99?

I agree that the gross overexposure sounds suspiciously like the aperture diaphragm is not closing down properly. Try setting the aperture to something reasonably smaller than maximum and depress the depth of field preview button, if the viewfinder fails to darken and the diaphragm doesn't shut down or shuts slowly when you look down the front of the lens then your diaphragm has failed in some way - in which case it's a repair shop job...

Sign In

You must be a member to leave a comment.

ePHOTOzine, the web's friendliest photography community.

Join For Free

Upload photos, chat with photographers, win prizes and much more.