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Jayd
Tinkerer
Username: Jayd
Post Number: 42
Registered: 06-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, May 17, 2009 - 02:04 pm: | 
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I want to use 220 film in my foldex 30 orginally desinged for 620/120. I have waisted a roll of film and found the spools clear and have the advancing down since the window will be blacked out: 7&3/4 turns from start to frame 1, then 2 turns frame 2 through 12, 1&3/4 turns frames 13 to 15. I wonder if there will be any other problems ? |
Ohm
Tinkerer
Username: Ohm
Post Number: 20
Registered: 09-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, May 17, 2009 - 04:22 pm: |
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You might have to shim out the film plane behind the film to get it flat as there is no backing paper. |
Glenn
Tinkerer
Username: Glenn
Post Number: 579
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, May 18, 2009 - 01:27 pm: |
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I think you will have a serious light sealing problem. I really cannot think of a single positive attribute for this 'conversion'. |
Dgillette4
Tinkerer
Username: Dgillette4
Post Number: 291
Registered: 04-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, May 19, 2009 - 06:15 am: |
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As Ohm says about the film plane yes it might have to be shimmed or pressure increased or maybe the present spring is enough. But I would place a piece of black paper the type used for storing enlarging paper over the peep window. The only advantage is longer shooting sessions. Don |
Ohm
Tinkerer
Username: Ohm
Post Number: 22
Registered: 09-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, May 19, 2009 - 07:48 am: |
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If you want to use 220, if you are like me I got a box of Fuji 160s for $12, I keep me old 120 spools and backing papers, I just carefully in the dark unroll the 220, cut it in half, attach it to the 120 backing paper and roll it onto a spool. This way I can use it on other cameras. |
Jayd
Tinkerer
Username: Jayd
Post Number: 45
Registered: 06-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, May 19, 2009 - 06:06 pm: |
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Thanks for all your comments
The reason to do this is I have a supply of Konica pro 160 220 and can get all I want at very cheap prices, not to mention more exposures per roll. Glenn the camera was made to take 120 as well as 620 so I don't understand why I would have more light leak trouble provided I block out the peep hole by flat black paint or electrical tape which I would do for 120 as well I just dont trust it with today's films and with my count I don't need it. As for the pressure plate I will likely try it with not adjustment then if results indicate measure the paper backing and shim the pressure plate by that much or I may mic the paper first to get an Ideal of how much diffrence it makes I'm making a wild guess of 10 thousands of an inch 0.010 inches I don't have percision measuring tools in metric and likely less.
One thing occurs to me : I should make sure the pressure plate is completely smooth so it does not damage the film. One might apply a plastic film over the pressure plate the thickness of the backing paper ?
Alot to think about.
Thanks again
Jay |
Glenn
Tinkerer
Username: Glenn
Post Number: 584
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, May 20, 2009 - 10:48 am: |
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Jay,
The paper backing was not just there to print the exposure numbers on. It gave a good measure of protection from light leakage, to the film stock rolled on the spools. This was especially so in the days when standard film speeds were much slower and films were less sensitive to certain parts of the visible spectrum.
It could be that the anti-halation coating will do the same job as the paper backing - you will just have to try a roll, making sure that the camera is handled in bright light. Well you want to test the worst case scenario, not ruin some important images because the day was beautiful and sunny. |
Jayd
Tinkerer
Username: Jayd
Post Number: 51
Registered: 06-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, May 25, 2009 - 06:37 pm: |
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Soon as I get the shutter back together I'll find out. |
