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11/26/2012 11:06:52 AM · #1 |
I remember reading about needing to "dial in" extra exposure compensation if the shutter time is over ~2 seconds (or was it 5? or 10?). So if the "correct" exposure would be 1/4" @ f/2, you would start by converting it to 8" @ f/11, but then adjust the aperture (or ISO) because of some weird effect of using a long shutter speed. I'm pretty sure it had nothing to do with the sensor heating up and causing noise.
I can't find the theory/directions anywhere, and maybe I was dreaming... but if anyone knows anything about this, please pitch in.
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11/26/2012 11:16:53 AM · #2 |
In the olden days (film) we had to do this to compensate for something called "reciprocity failure." This happened because film acted slower (effectively became lower lower ISO) in very low light.
With digital sensors, you don't have this issue at all. |
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11/26/2012 11:34:46 AM · #3 |
Ohhhhh it was that long ago that I read it? I haven't shot film since 2007. Thanks for the info :)
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