What are the pros and cons of ISO 50 if you shoot in raw?

Sharlin

CR Pro
Dec 26, 2015
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Turku, Finland
Depends on what the sensor's "native" ISO is. If you shoot some Nikons at ISO 64 you absolutely get more DR because their sensors can store maybe half a stop more electrons per photosite before saturating. With Canon bodies ISO 50 is a digital transformation, like the "H" ISO settings, and should be exactly the same as overexposing by a stop and pulling in post if you shoot RAW. Either way shadow noise is reduced and you get to use a larger aperture and/or slower shutter speed, but at the expense of losing a whole stop of DR in the highlights.
 
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Ozarker

Love, joy, and peace to all of good will.
CR Pro
Jan 28, 2015
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The Ozarks
This past week was my first time shooting at ISO 50 because I didn't have my ND filter handy and was at 1/8000 sec shutter speed @f/1.2. I had no problems. Third photo was also at ISO 50.
 

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