Hello all, hope you had a happy Christmas Day and are getting ready to get suitably sloshed!
Well I have a STIFF WARNING for any users like me that are relatively new to using adapters on their Canon cameras. I sit here next to an unusuable 1DsIII that has a 35-70 PERMANENTLY attached to it, that is until Canon CPS can remove it from the body. I am completely gutted to say the least right now so read this carefully so you dont do the same.
Yesterday after a freezing night after photgraphing a bridge in Wales, I changed lenses to my CZ 35-70. All I can think happened is that the 1DsIII lens lock button got stuck in from the cold. As I attached the lens and twisted it into place, the pin did no pop into the hole on the adapter. I continued to turn the lens waiting for the 'click' and the the lens went slack in my hand. Basically I the lens turned completely past the locking point. No manner of reversing the procedure released the lens and I cannot get it off the body.
The lens will not dismount for reasons unknown right now, but I can only assume the the AF confirm pins and chip etc are stopping me from releasing the lens in the way I mounted it, banging into part of the camera mount, or something inside which is very worrying.
Ensure the locking button on the camera is functioning, especially in cold weather, or the lens you attach could turn past the point it is supposed to. This situation could also happen in user error, eg - pressing the button to dismount the lens and turning it the wrong way.
This could be potentially disasterous on the 1DsII so Hubsand has informed me.
Is the repair covered under warantee? I doubt it, I cant convince Canon that the pin, that now works perfectly, was stuck inside, all I can do is plead that this was the case. I am just praying it's not a complicated job to remove the lens.
This would never have happened if the lens adapter had some kind of locking screw to stop overturning the lens in the mount, why is this not a standard feature? All sorts of trouble could be avoided. Deshojo (fellow FMer) says he has an adapter that wont over turn and other ones that do. I only have one other adapter on my 28mm f2 and that overturns as well, but doesnt have AF confirm electronics; I am assuming it can be turned backwards if this situation should come about but I dare not try it.
Any comments on this matter would be gratefully received as I am livid right now and facing a possible hefty bill from Canon. They will take a dim view of my ALens 'tinkering' no doubt....
A fellow FMer had this same problem recently. There should be a stop screw on the adapter, positioned to stop rotation just past the camera lock button. I once paid a premium for the Fotodiox Pro adapter and it had no stop screw, either.
Sorry to here about that David. I have had issues with cheap adapters over turning when I try to remove them from the camera. I now go slow and easy when mounting and dismounting alts.
Dan
www.danbrownphotography.com
David, this is of course horrible, and I am sorry to hear of your problem.
About 3 months ago, I read an old review of adapters wherein the author raised this same issue, warning that some adapters don't have a stop-pin. I posted a thread here, linking this article and asking members here if this was a real issue. Everyone poo-poo'ed it, saying that adapters haven't been made like this in years. Yeah, well, here you go.
I've also seen some cheap adapters on Ebay, recently, that looked like they had no stop-pin. (or screw, or whatever)
I hope everyone reads this, and checks their adapters carefully.
I am not going to say who made it as I don't think its fair. In the end I should have noticed that there was no stop screw and stopped using the adapter or fitted one. For all I know the screw may have fallen out, so there will be no finger pointing from me.
I totally agree, here stands a bit of a testament. Ensure the adapter has a stop screw. If the adapter had no AF confirm electronics I can see that removing the lens would still be possible. Cheap adapter or not, there must be a stop screw, especially if you use a 1DsII from what I was told....
David, this happened to me with a Nikon body and the only way to remove the lens was to continue rotating it the whole turn until it reached the exit point. Also I needed to slightly pull the lens while rotating to keep the bayonet on track.
Back when the Zeiss 21's were first becoming popular here I remember Guy Mancuso having this happen to him with a "good"brand of adapter. But this was before any of them had pins.
I have quite a nice collection of old Zeiss glass and have finally bought in a few adapters to try and give them a new lease of life on my 5D. I have to say that so far I'm not overly optimistic that I will see this through - the Zeiss lenses seem very variable on the lens mount section and with the variability of the adapters it really seems like you are rolling the dice whether you will get a usable result at the end of the day.
So far I have several lenses that have shaved the mirror box on the side (metal particles flying around) and the bottom (bits of plastic shaved off from there). One of the adapters (from the 'PRO' range I purchased) had real difficulty mounting on the 5D and to get it to fit a bit better I had to remove the locking screw (because it seemed to be either in the wrong position or the wrong size and it too would hit the camera mount flanges and shed metal particles) so I can only assume that I'm now running the same risk as David and might inadvertently mis-mount a lens.
I wonder how easy or complex it might be to actually completely bypass the adapter and have a old Contax camera mount attached to my 5D?
I guess that the one good thing that has come out of this is that I have now managed to make a comparison between my ZE 85 and 50 and my old C/Y 85 and 50 and they seem almost identical, so as long as I don't mind forking out the money it looks as though I can get modern replacements for my old Zeiss lenses (the new ZE's are slightly greener on colour balance than the old C/Y lenses, which seem slightly magenta biased and the old C/Y 50 F1.4 is sharper wide open). Shame we have to wait for the new ZE 21mm.
The Hong Kong sourced M42-EOS adapters I use for lens conversions, have really proven themselves as precise fitting and of course have stop screws. The variability of adapters mentioned above is what prompted me to try prototyping an EF flange that screws into the original 6 holes of a Leica R lens. The spacer with EF flange fits over the stock Leica R flange and is reversible. I will eventually try this on a C/Y lens, as well, and eliminate the adapter altogether.
Here is the prototype spacer with inset EF flange sitting on top of the Leica flange, next to the Leica-EOS adapter, stopscrews facing each other: http://farm4.static.flickr.com/3109/3154089702_3732ae3cc8_o.jpg
All I have to do at this point is drill the 6 holes and reduce the spacer thickness until infinity focus is achieved.
I have the same thing happened to me last night and thought I had to take my camera to repair shop... I had it worked out by the way by turning the lens clockwise till it clicks again and normally removing it. This happened with my Leica R lens on a 5D body.
The problem I had was mounting nikon and leica lenses on the 5D one turns one way and the other turned the other way . Turn couterclockwise to remove lens for Leica and Canon and the opposite direction for Nikon. I need to stop and think each I make lens changes.
