30 Minute Exposure?

Discussion in 'Photography Beginners' Forum' started by Buszaj, Aug 31, 2007.

  1. Buszaj

    Buszaj TPF Noob!

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    How on earth do you get a 30 minute exposure on a DSLR?
     
  2. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    Set the shutter to bulb and start your stopwatch. Also, make sure you have plenty of batter power left...because the camera uses electromagnets to hold the shutter open.
     
  3. kundalini

    kundalini Been spending a lot of time on here!

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    Crank your shutter speed down to "bulb" setting. Focus, shoot and have an adult beverage, go read a book, play with the cat or whatever for 30 minutes.

    Depending on your subject, you may want to play with the aperture, but I suspect an f/22 or more if you lens will allow. Also you may also want to block the viewfinder so that light can't creep in that way with an exposure that long.
     
  4. Garbz

    Garbz No longer a newbie, moving up!

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    Be prepared to wait another 30 min beyond that since the camera will take a second picture if NR is turned on. If you turn it off you will need lots of post processing work. The noise introduced is in the form of dead pixels (not permanent) which die bright leaving very annoying spots. And you'll see a purple fringe start growing into the edges of the frame curtsey of the sensory getting very hot when running.
     

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