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I don't think the iPhone HEIF is 14/16bit. And I'm not sure a single shot on a sensor that small has that much dynamic range anyway, so you'd still want HDR+ style multiple exposures. Just wish the end result wasn't stored 8bit so you have more freedom to change the exposure/shadows/highlights after the shot is saved

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Yeah I think the big issue here is that HEIF is typically used to get JPEG level quality at a lower file size. Increased bit depth would negate those file savings, and I bet Apple/Google would just prefer you use RAW.

14bit HEIF is still smaller than 8bit jpg. And lossless raw is easily 5-10x the size

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