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  1. #1
    Terrance Hounsell's Avatar
    Join Date
    Nov 2004
    Location
    Mount Pearl. Newfoundland
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    4x5 Format
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    Do MP3/4 Copal Shutters function differently ?

    I am building a 3 shutter camera and have been buying MP3 and MP4 copals for this purpose. The last one I bought seems to work perfectly except that when you release the shutter it opens to about 90% and then you must relax the cable release in order for it to complete it's operation. I thought that this might be a defect but a friend said that perhaps this shutter was used in conjuction with another shutter or some form of lighting etc... that required a lag thus the hesitation was designed into it from the start.

    Can anyone give me a run down on the shutters available from MP3 and MP4 Polaroid cameras?

    Thanks in advance.
    Experience is a wonderful thing. It enables you to recognize a mistake when you make it again.

  2. #2

    Join Date
    Mar 2005
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    Hmm. I have two ex-MP-4 Copal 1s, one ex-CU5 Copal 1. All work normally. If the cable release you used with it works properly on your other shutters, your last one probably needs service.



 

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