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Geoff,
Leave the camera in manual mode (as that is what you'll be shooting your lights with, as well) and set the ISO to ISO-100. Look through the viewfinder into your light box and adjust the shutter speed so that the exposure/meter falls on the centre tick (which is 0 EV). Take a photo and observe the histogram. Ideally, you want the histogram to peak somewhere between 1/3 to 1/2 way across the display. If it doesn't, then, increase or decrease the shutter speed.
Once you've found a setting that you're happy with, stick to it, and fire off between 15-19 flat lights (make sure you take an odd number of flat lights as you will be median combining them). Then, put the camera body cap on, make sure the viewfinder is covered, and take between 15-19 dark frames which match the same exposure duration as your flat lights.
Regards,
Humayun
Last edited by Octane; 12-10-2009 at 07:42 PM.
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