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Beth_nagle
Tinkerer
Username: Beth_nagle
Post Number: 1
Registered: 12-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, December 13, 2006 - 08:05 pm: | 
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Greetings, I searched the archives but couldn't find anything that addressed how to test your light seals. I just replaced them on a FTB QL. Thanks in advance for any help.
Beth Nagle
www.eclecticcafejournal.com/WordPress |
M_currie
Tinkerer
Username: M_currie
Post Number: 23
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, December 13, 2006 - 09:05 pm: |
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That's a good question. My best guess would be to go out and get a roll of the fastest cheap print film you can find and take pictures in bright sunlight. Maybe aim a powererful flashlight at all the seams for a few shots. Turn the camera every which way, including upside-down, have some fun and see what the prints look like. |
Beth_nagle
Tinkerer
Username: Beth_nagle
Post Number: 2
Registered: 12-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 14, 2006 - 05:04 am: |
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Thanks, well, I was hoping there was a way to do it without using film.  |
Charlie
Tinkerer
Username: Charlie
Post Number: 39
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 14, 2006 - 07:18 am: |
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They get very mushy. If you see small black specks near the seals or if you can dig them out easily using a toothpick they need replacement. |
Glenn
Tinkerer
Username: Glenn
Post Number: 113
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 14, 2006 - 07:30 pm: |
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If you have used the proper materials ie one of Jon Goodman's kits, cut to the correct size and placed in proper position, you will have no need to test.
However if you really insist on testing. On loading your next film wind to frame one and test fire your electronic flash two or three times around the camera back. Wind on twice before taking any important subjects. your first negative will indicate any leakage under intense light conditions. |
Rick_oleson
Tinkerer
Username: Rick_oleson
Post Number: 120
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 14, 2006 - 09:53 pm: |
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There is no way to do it without film. You can test without film for light leaks almost anywhere else, by opening the back and inspecting with a flash or a bright flashlight in a dark room.... but back seals can't be inspected with the back open, and there's no way to detect light getting through them except with film..... |
Krp
Tinkerer
Username: Krp
Post Number: 16
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, December 15, 2006 - 06:25 am: |
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You would not need prints for the test. The negs will do, 'process only' for the roll. |
Charlie
Tinkerer
Username: Charlie
Post Number: 41
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, December 15, 2006 - 03:35 pm: |
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Even if it's not leaking yet pieces of a disintegrating seal can gum up some of the mechanisms in the camera. If in doubt --- |
M_currie
Tinkerer
Username: M_currie
Post Number: 25
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, December 16, 2006 - 04:15 pm: |
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"Even if it's not leaking yet pieces of a disintegrating seal can gum up some of the mechanisms in the camera. If in doubt ---"
Good point in general, but Beth is testing a new set of seals. |
Beth_nagle
Tinkerer
Username: Beth_nagle
Post Number: 3
Registered: 12-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, December 17, 2006 - 01:39 pm: |
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Thanks all for your comments.
Glenn, I did end up getting a better kit via Mr. Goodman and he has been very helpful. I will get the kit soon and follow his excellent instructions and will just load up with film and fire away. |
Paul_ron
Tinkerer
Username: Paul_ron
Post Number: 9
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 21, 2006 - 04:09 pm: |
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There is a way to test em. Put a bright light inside the camera and take it into a dark room. If you see any light leaking out, the seals are shot. |
