See the ETTR workflow area for more on exposure and noise and push/pull.
An optimally-exposed RAW has benefits even at the base ISO of 100 for the Canon 5D Mark III, whose noise performance is very good, but tends to excessive shadow noise
JPEG is not an option, as it blows out the exposure required for optimal noise performance. But JPEG blurs away so much fine detail anyway, its use is a natural noise-suppressant, along with detail suppression.
Entire bracketed exposure series
For this comparison, the 1/3 second and 1.30 second RAW exposures were used, as per the findings on the JPEG vs RAW analysis page for this series (see that page for the entire scene).
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