| Author |
Message |
    
Chuck Frey
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, August 29, 2005 - 12:57 pm: | 
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Recently I bought a Zenit 312m at a flea market--at least it was cheap. In a moment of poor judgment,i tried an older Pentax lens on the camera and then discovered I couldn't get it off.
The lens turns about a quarter inch and than hits something and won't unscrew. (It's not the diaphragm pin because I checked. Any advice? |
Jan Dvorak
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, August 29, 2005 - 01:18 pm: |
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Chuck,
Is this an older Super Takumar, or the newer Super Multicoated Takumar version? The SMCT has pins and protrusions on the rear to facilitate full aperture metering with Spotmatic F and the Pentax ES / ESII.
Specifically, there is a tiny pin on the mating surface of the lens mount (surface which sits against the mount of the camera). This pin prevents the lens from being switched to aperture stop down mode when mounted on the 'F', 'ES' and 'ESII'. I have a feeling this is the pin which is preventing the lens from being removed.
Try to peak between the mating surfaces of the lens and the camera to see if this is the case. The trouble is, that it might be very difficult to remove the lens if this is the problem. I have seen many SMC Takumars with this pin sheared off....
Good luck,
Jan |
David
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, August 29, 2005 - 10:08 pm: |
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If you open the back of the camera and fire the shutter set to B, you may be able to see through the camera to the back of the lens and see what is stuck. |
Jan Dvorak
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, August 29, 2005 - 11:09 pm: |
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I am quite sure that is what Chuck already did; that is how he found that the auto aperture pin was not the culprit.
The only other item on the back of the SMCT is a lug which indicates maximum aperture to the body, that could also be fouling something inside the Zenit.
In my previous post I meant to say "Try to peek..." and not "...peak...".
Good luck,
Jan |
