LBJ2 Offline Upload & Sell: On
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maestrofilms wrote:
I've seen a few articles and vids referencing Sony cameras and ISO invariance. The theory being you only shoot in ISO 100 or 640, whichever is closest to the exposure you want, and then raise exposure in post. I guess you maximize your dynamic range that way, because higher ISOs just apply gain anyway and is no different than bringing it up in Lightroom or other editors.
Is there anything to this? Doesn't seem practical in the long run, and you would have to guess at the appropriate aperture and shutter speed sometimes. Anyone ever try it?
If you read the same threads/posts I did, I think this applies to the A9's dual conversion gain technology describing ISO 100 and 640 as "dual base/native ISO settings." So in theory change from ISO 100 directly to ISO 640. Which I did recently during an A9 birding shoot in low morning light and overcast skies. Unfortunately, I was so busy keeping up with the fast moving bird activity, I didn't get a chance to compare ISO640 to 200/400 but have been meaning to test this out again for myself.
As far as the A7rII goes, IMO ISO 100/200 take your pick and use as needed.
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