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Thread: 2-3-4 seconds exposure

  1. #1

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    2-3-4 seconds exposure

    Probably a stupid and FAQ but anyway. All my lenses have shutters with maximum of 1 second exposure. I'm wondering if there's a better technique for measuring 2, 3, 4 seconds, etc., well, other than counting "twenty-one, twenty-two", etc.

    Thanks!

  2. #2

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    Re: 2-3-4 seconds exposure

    Quote Originally Posted by JavaDuke View Post
    Probably a stupid and FAQ but anyway. All my lenses have shutters with maximum of 1 second exposure. I'm wondering if there's a better technique for measuring 2, 3, 4 seconds, etc., well, other than counting "twenty-one, twenty-two", etc.

    Thanks!
    I usually stop down to have an exposure of four seconds or longer, that I time with a watch.

  3. #3

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    Re: 2-3-4 seconds exposure

    You can bring with you a small electronic timer, but if you are worried of how exact is your counting, I wouldn't be too concerned.

  4. #4

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    Re: 2-3-4 seconds exposure

    I've always wondered - has anyone found a timer unit that would screw into the cable release receptacle and would doubly actuate the shutter on bulb? That is - the timer would open the shutter automatically then in a set number of seconds close it either all mechanically or electrically. Something like this would sure be handy. I have a couple of mechanical self timers (bought on the island of Malta, but of British origin I believe) that screw into the cable release receptacle and are spring actuated - they are wound up then released and whirr down for 15 seconds then release the shutter. Seems it would be possible to produce one that would both open and close a shutter set on B or T in a pretty precise manner.

    Nate Potter, Austin Texas

  5. #5
    Weekend Warrior Sanjay Sen's Avatar
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    Re: 2-3-4 seconds exposure

    I carry a stopwatch, and try to get exposures in the 4+ seconds range.

  6. #6
    Scott --'s Avatar
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    Re: 2-3-4 seconds exposure

    Electronic kitchen timer for anything over a second.

  7. #7
    Eric Woodbury
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    Re: 2-3-4 seconds exposure

    I just count them off, one-mississippi, two-mississippi, etc. At those exposures, reciprocity is kicking in and for BW, what difference does it make as long as you have enough. For long exposures I use a watch.
    Last edited by Eric Woodbury; 8-Feb-2008 at 18:33. Reason: grammar
    my picture blog
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  8. #8
    Dave Karp
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    Re: 2-3-4 seconds exposure

    I use my watch. Once you are into reciprocity failure, total accuracy is not really necessary.

  9. #9

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    Re: 2-3-4 seconds exposure

    Duke, just count and enjoy. A quarter-second error at 2 seconds is less than 1/3 stop, and you'll more than likely be closer than that. Don't obsess over a non-problem.

  10. #10
    kev curry's Avatar
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    Re: 2-3-4 seconds exposure

    For 2 - 3 second exposures I find it easier to do multiples of 1 sec exposures using the shutter. You just have to calmly and smoothly re-cock the shutter to ensure you don't jar the camera. For longer exposures I use the stopwatch on the hand phone.

    kev

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