Why ETTR?

Started Dec 20, 2013 | Questions thread
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tesilab
Senior MemberPosts: 2,476Gear list
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Re: You're still missing something
In reply to Ysbrand Galama, Dec 22, 2013

An overexposed jpeg discards the same highlight information you are hoping to recover by adjusting the exposure back down after the fact. Jpegs only store 8 bits of information per channel, some camera raws give you up to 14 bits per channel. A blown out value in a joeg could potentially contain up to six additional bits of information per channel. 8 bits buys you 256 unique levels, where 14 bits would get you 16384 levels.

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