FD lock ring stuck

[bill_force]

<p>I mounted an 80-200mm lock ring lens on my AE-1 Program and it seemed ok but then when I tried to remove the lens the lock ring stops about 3/8 of an inch short of the 'red dot' position and I can't budge the lens? I tried all the buttons etc. but it won't move past that point. Is there a reason it becomes locked and how do I remove the lens?</p>

[flatulent1]

<p>Sometimes it takes a bit of fiddling. With the lens fully attached, press in the stop-down lever, rotate the aperture ring so it's set to, say, f/4. Release the stop-down lever and try to remove the lens.</p>

[gordon_yee]

<p>If the aperture ring is set on automatic (i.e., the green "A" beyond the smallest aperture), try setting it to a manual aperture to retract the small AE signal pin.</p>

[bill_force]

<p>This one is really stuck, the aperture ring will turn but the aperture doesn't move so something in in wrong. Any ideas as to how to remove a stuck lens either via the camera or disassemble the lens?</p>

[flatulent1]

<p>Tighten the lock ring, get everything in place as if you were going to shoot. Trip the shutter, advance the film, and then try to remove the lens. As I said, it takes a bit of fiddling. It's been a long time since I had one stuck like that.</p>

[maderik]

<p>The one I had stuck on a Canon EF body was because the index pin had sheared off and jammed in the breech. I ended up using a dremel to carefully cut through and remove the lock ring. Lens was trashed but no damage to the body. </p>

[bill_force]

<p>Well FD fans, I have good news. There is a small screw (single) on the side of the lock ring, I removed the screw and it immediately turned the ring to the unlock position and I was able to extract the lens. I then reinstalled the screw and attached several lenses and all seems to be O.K. I still can't figure out how it got installed incorrectly in the beginning?<br>

Something to remember in the future if it ever happens to you, just remove the screw and the ring will turn.<br>

Thanks<br>

Bill</p>

[thomas_goehler]

<p>Which lens were you using exactly? Was it a breech lock lens with a chrome ring or a new FD without the chrome ring?</p>

[gordon_yee]

<p>Normally, there are <em>two</em> screws on the breech ring about 14mm apart. Their purpose is to locate a small bracket that prevents the breech ring from unscrewing past the red index mark. Bill, was the second screw missing on your lens? If so, it's probably the source of your original problem. The small bracket would have loosened, jamming the lens mount.</p>

[mwmcbroom]

<p>Hmmm . . . maybe this isn't a Canon lens?</p>

[bill_force]

<p>Absolutely Canon 80-200 FD BL. I bought the lens used off the net and evidently one of the screws was missing and it had cocked the stop piece under the ring. When I released the only screw left it released the ring and it's O.K. now. I tried several other lenses and all seems O.K.<br>

I suspected something wasn't right when I bought the lens. When I opened the package the front lens element had come loose with the retaining ring and was lying separate. I live in South America with virtually no repair service and the trip here evidently vibrated it a bit. I had fun reassembling it and calibrating the focus but O.K. now. Whomever had the lens before I'm sure dissasembled it or maybe a service company but several things were loose. I put it back with "lock tite" on the screws and seems to be O.K, for $45. I'm not going to anguish about it. One of the problems with ordering items off the net is the return freight both ways costs more than the item, I never have returned an item, I just eat them.</p>

[mwmcbroom]

<p>Glad to read you've got your 80-200 back in service. Yours is the older two-ring zoom, which has always had an excellent reputation, so it should serve you well, methinks.</p>