2008/10/21 AlunFoto <[EMAIL PROTECTED]>:
> Exposure time was 926 seconds, ie. roughly 15 minutes. The
> lightbrushing was sort of an afterthought, I didn't do it through more
> than half the exposure, I think. It's mostly a hit & miss process to
> me. Beginners luck, I guess.

To take some of the hit a miss out of the process, when I don't have
enough time at a location to experiment with long exposures, is to use
short (1.5-2 min) high ISO exposures to work out my base exposure, how
much light painting I need & confirm correct focus.

Then I work backwards to calculate the exposure time for the lowest ISO setting.

Cheers,

Dave

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