04-05-2015 11:36 AM
I have the same lens, 2 Canon Cameras EOS 40D & 7D
Same result with both cameras, auto focus in auto mode only, manual mode is strange, the lens is locked when I set to auto focus, however does not actually auto focus, I am sincerely hoping that there is an answer for this question.
Results are identical on both cameras, my initial conclusion is that it was designed that way and unsure as to why, I will be watching this thread closely.
So far this is the only disappointment regarding the lens.
04-06-2015 05:28 AM
04-06-2015 10:06 AM - edited 04-06-2015 10:06 AM
There are Custom Controls in the camera that change what certain controls do, even the shutter button. It is very likely a setting was changed. Please do the following: