Question about Canon EF-S 17-85MM F/4-5.6 IS USM Lens
I experienced the same problem ( Err 99) on similar set-up after taking around 9000 shots. I have read solutions from upgrading firmware to 2.0.3 and extensively cleaning the gold contacts on the camera and the lens with alcohol. Since my firmware is already ok, then I think the cleaning did the thing.. my camera does not randomly give the error anymore!
Posted on Dec 01, 2008
Assuming that other lenses function normally on the camera, the "Err 99" can be caused by a failure of the aperture component in the lens. Error 99 is a generic error, so unfortunately it does not indicate exactly what is wrong. There are other factors that can cause the failure, but there is a good chance that the aperture is not functioning correctly. You can try cleaning the electrical contacts on the lens, if this does not work you may need to get the lens serviced. Check with Canon, or check the web for other repair service providers. David Millier Advance Camera Repair
Posted on Mar 06, 2007
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Feb 06, 2013 | Canon EOS-20D Digital Camera
Apr 04, 2012 | Canon EOS 20Da Digital Camera
Aug 07, 2011 | Canon EOS-20D Digital Camera
Dec 08, 2010 | Sigma AF 70-300mm f/4.0-5.6 DL Macro Super...
Mar 23, 2010 | Canon EOS-20D Body only Digital Camera
Dec 04, 2009 | Canon EOS 450D Digital Camera
Jan 05, 2009 | Canon EOS-20D Digital Camera
Nov 30, 2008 | Cameras
Aug 07, 2008 | Canon EOS-20D Body only Digital Camera
3,656 people viewed this question
Usually answered in minutes!