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Don Nathan
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, August 16, 2005 - 07:02 pm: | 
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Can a Pronto from a 35mm Agfa be swapped into a Zeiss Ikoflex TLR? The Zeiss in question is a great old camera but has a broken shutter, although it does run at one speed only, my guess 1/100th - so it is still a user, but a bit lame. I would like to get it into full working order if possible and have a cheap Silette that could be a donor. |
rick
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, August 16, 2005 - 10:06 pm: |
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Shutters came in a few standard sizes from each maker; generally speaking, if the shutter looks to be the same size and is the same make, then it can be interchanged. This is not true for everyone, but I think your chances are pretty good with a Prontor. I'm not sure if changing a shutter from a front-cell-focusing camera to a unit focusing one makes it more complicated; I think it should still work.
Are you sure that the Ikoflex shutter is broken and not just dirty? It might be easier to clean it than to change it. |
Winfried
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, August 17, 2005 - 12:14 am: |
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Some shutters were modified to fit on special cameras. Especially Prontor shutters which are NOT cocked with an extra external lever but 'internally' via the cocking shaft have several varietes concerning the linkage of the cocking shaft to the camera's cocking mechanism. AFAIK the Silettes have such an internal cocking linkage.
Usually all shutters of same make have the same threads, regardless whether they were used for front-cell or unit focussing lens. There are very few exceptions.
Anyhow, I did not encounter too many shutters which were actually broken. If your shutter runs at a high speed only probably the speed escapement is severely gummed. The part which is supposed to stop the movement of the cocking shaft for a short moment sometimes does not return to its rest position. This usually can be fixed by a good shutter cleaning. |
Dan Mitchell
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, August 17, 2005 - 12:19 am: |
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Like Rick said, the shutter swap might work. However, the diaphragm will not show the correct values and/or may not open to the proper maximum aperture due to different focal length on the lens. Possibly using the aperture scale from the original will give correct indications.
I agree with cleaning the original shutter first. Only a single speed sounds like a dirty escapement. |
Don Nathan
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, August 17, 2005 - 09:36 am: |
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I removed the slow speed escapement because the main spring did not have the power to cycle with it in place. The shutter was damaged when I opened it, the cap screw on the cocking lever/main spring assembly was broken off, and the lever was out of position to the point where it would not work. I was able to replace the broken screw using a similar part taken off of the self timer assembly. I'll clean the escapement and replace it, but it seems to function alright. Perhaps the main spring does not have enough strength. The proposed replacement unit does have internal cocking. |
