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Tinkerer
Username: Walkersj
Post Number: 1
Registered: 10-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, October 02, 2007 - 02:13 am: | 
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I have a Cosina CSL, (similar to CSM, and maybe others) which has a
horizontal cloth shutter controlled by an electromagnet. With a bit of
bending and and adjusting of the magnet and the operating arm,
(accessed from the bottom of the camera) I can get all the slow speeds
up to 1/60 to work alright, but the speeds above that either don't work
at all, that is the blinds travel across together with no gap, or all
the higher speeds seem to be about 1/60, checked by viewing the
computer monitor through the shutter a la Rick Oleson. Other cameras I
have give results similar to those on Rick's site, so there is a
problem with this particular camera. I've had the top cover off but I
can't see anything obvious. Is the problem in the electronics, or
elsewhere, any ideas? (It's quite a neat little M42 camera, which it
would be nice to get working properly, or would it be quicker to just
buy another one?) |
Walkersj
Tinkerer
Username: Walkersj
Post Number: 2
Registered: 10-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, December 05, 2007 - 01:51 pm: |
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Well I've come back to this camera and after reading about Fujica cameras being fixed by changing the capacitors I thought I would give
it a go. It didn't make any difference! So I tried some new batteries and lo and behold one of the batteries was faulty and only produced about 0.2V but the shutter now almost works on the faster speeds. The battery voltage is so low the light meter doesn't even work, so what does this mean? Is there some sort of voltage regulator thats supposed to drop the voltage to the electromagnets? |
