Originally posted by stevebrot The mirror does not return properly to the correct angle. The most obvious effect is that manual focus is difficult and/or impossible. Less obvious is that PDAF may fail. The light for the PDAF sensor is directed through the (half-silvered) main mirror and angle is important. Comparing with AF in live view (CDAF system) allows you to rule out the lens or the AF drive as the cause of the problem.
Steve
Thank you again Steve. Focus will go past and then back to the correct focus in live view (this is normal for CDAF right?). However in regular mode (using PDAF) the focus won't focus and I can't fully press down the shutter to take a picture. Consequently I think you are correct Steve on your diagnosis. What can I do to fix this problem? Is there anyway to know if it is the PDAF module or a mechanical issue inside the camera? I have a wedding in a week I'd like to get some good pictures at.
Cleaning the front element seems to have no effect. Is gently wiping the front element with cotton bad for the SMC coating?
Last edited by Newtophotos; 10-08-2015 at 06:31 PM.