50mm /1.8 stuck on 1D MK II

I was shooting rehearsal today with my 50 and went to change lenses and it wouldn't budge.
I am able to push the release button down but then lens will not move. It just wiggles a tad, but the same amount as if I didn't push the button down. When I push the button down it sounds like something is happening but the lens won't come off. Any ideas? A google search lead to a bunch of unanswered topics. Thanks!

Edit: Forgot to add. I can still take pictures and they turn out just fine. No AF problems either.

Sounds like a screw backed out on the lens mount and is hanging up, i've read about it before on here. Not sure the outcome was pretty though, IIRC the lens mount broke before the camera mount...which is the best case scenario.

You can try aiming the lens at the ground, then holding the button while twisting the lens back and forth. Has worked for some people to jiggle the screw back into the lens far enough.

I too have heard about this happen to others, and actually with the same type of lens. I've never heard about anyone fixing it without destroying the lens, regardless of if they took it to a good repair shop.

The 50 1.8 doesnt have any screws the body does. Even it a screw came loose the lens is smooth with exception of the hole for the lock pin. If you turned it far enough for the screw to get in the lock pin hole the OF would not work. If you put thumb pressure on the lens holding it up to the light you will be able to see if the lock pin is moving. All this is assuming the 1d has the same mount as my 50d.

My lenses have screws. If there isn't any on the 50 1.8 then maybe those I'm thinking of was the 50 1.4. I'm not sure.

apersson850 wrote in post #8991450
My lenses have screws. If there isn't any on the 50 1.8 then maybe those I'm thinking of was the 50 1.4. I'm not sure.

Probably the 1.8 is the cheap plastic one. The 1.4 has a metal mount.

I would try to shake it while slowly trying to twist it off...

At least you did not get a fisheye stuck n there

The 1.8 has two screws but they are in a different place. Ended up just messing around with it and it finally release. I checked for damage and their wasn't any on the mount or the lens. Tried another lens and went on/off just fine. Then I felt gutsy and put the 50 back on and it worked just fine. I used both lenses again today shooting rehearsal. I guess I had some good luck!