RE: Exposure Value
RE: Exposure Value
- Subject: RE: Exposure Value
- From: Roger Breton via colorsync-users <email@hidden>
- Date: Fri, 21 Jun 2019 23:19:48 -0400
Dear Ilah,
RawDigger looks like quite a potent RAW analytical tool.
Thanks for mentioning it 😊
Glad it runs on Mac and Windows.
/ Roger
-----Original Message-----
From: Iliah Borg <email@hidden>
Sent: Friday, June 21, 2019 6:33 PM
To: email@hidden
Cc: email@hidden
Subject: Re: Exposure Value
Dear Roger,
Based on your gray card NEF:
You are in 14-bit mode, maximum is 2^14-1-black level (600) = 15873; average on
the card (and the card seems to have some rather strong imperfections) is 1181
(you can check with RawDigger, trial version is enough). That puts the exposure
at log2(1181 / 15871) = 3.75 EV below clipping; the camera is calibrated to
produce midtone 3.35 EV below clipping, that means the exposure is 0.4 EV below
the midtone.
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