dleebrick wrote:
Was out in the field photographing waterfalls, switched lenses to my EFS-10-22 wide field lens, turned the camera on and ...ERR 20 "shooting is not possible due to an error". Turned off camera, tried again, same error. Switched back to my EFS 18-135 lens. No problem. Cleaned contacts on my EFS 10-22, tried again, same error. Switched back to 18-135, no problem.
When I got out to a spot where I had cell reception, I looked up ERR 20 and most solutions said to turn off camera, remove battery, remove lens, try again. Error apparently is some mechanical issue with the shutter that usually requires a service call. Did multiple times, didn't work. Put on 10-22 lens again. Still got ERR 20. Removed lens, happened to notice a small 1" o-ring sitting off-kilter over the camera mirror. Looked at the lens and something looked a little different. Turns out that the o-ring is part of the inner mating surface of the 10-22 lens and had come loose. Replaced the o-ring on the lens, put the lens on the camera, and no more ERR 20!
Haven't seen this listed as a possible solution to ERR 20 problems, so thought I would share it. Looked at my other EFS lenses and they don't seem to have a removable o-ring, so maybe that's unique to the wide angle item.
Was out in the field photographing waterfalls, swi... (
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Great field work! I have the 80D and was considering a wide angle lens if Santa’s feeling generous this year. I book marked this for future reference. Thank you!