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Hi all
Herewith my reasoning. Assume a 14bit analog to digital converter .Max levels =16384.
Assume 1 electron = 1 analog digital unit .
Assume 10 electrons readout noise.
ISO=gain therefore amplify noise as well as signal.
ISO 800 = 4 X greater than ISO 200.
If exposure time decreases so does signal assuming constant source .
Read out noise is constant disregarding noise reduction. ie switched off. As can be seen the signal to noise ratio for raw stays the same between ISO 200 and 800 as well as for jpg(although worse for jpg).
Hence my statement no signal to noise ratio differential for raw but a large dynamic range difference.
Hence logic tells me better to use raw at low ISO and jpg at high ISO.
When shooting jpg it makes sense to use a high ISO because you need as much signal as possible considering the fact that the compression algorithm is going discard a large amount of data.
Dennis you were 100 % correct with respect to interval shooting from the EOS Utility software with MLU regardless of state of firmware version. The remote controller works fine with long exposures and MLU.
Perhaps a bug in EOS utility software?
Thanks for listening to my pedantic ramblings but this is how I learn.
Kind regards
SteveRAWJPG(50%COMP)ISO200ISO800ISO200ISO800MAX LEVEL16384163841638416384SIGNAL10040050200LESS TIME LESS SIGNALREAD OUTNOISE10401040REMAINS CONSTANTMIN LEVEL0000DYN RANGE1638.4409.61638.4409.6S/N RATIO101055
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