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p.1 #25 · New article - Why shoot RAW - The real answer | |
atufte wrote:
Why all this comparing with Ken Rockwell... , this article was made just to point out the real benefits of shooting raw, not only that you can change WB easier, like so many people refers to as the most important RAW feature, which to me is totally bollocks, since you can just use the grey picker in "levels" in PS, and it does exactly the same with your JPEG's...
I do not feel this is fair, but since it bothers you guys so much, that i post this "wafer thin article"
i will not post anything like this again, trying to give a friendly tip is obviously not always the right thing, at least not here...
I stopped at the second paragraph when I hit the first major technical error.
RAW does NOT necessarily provide more Dynamic Range. It depends strongly on the camera used and the JPEG profile chosen. What the extra bit depth of RAW provides is finer resolution of the dynamic range, which primarily gives you more room to manipulate that data without running into posterization. If you have a camera that delivers 10 stops of DR, you can represent that as 256 different levels in 8 bit JPEG, 65,536 levels in a true 16bit file, or 4096 levels in a 12 bit RAW file. But you're still getting the same 10 stops of DR. Your description of the results of excessive editing of a JPEG are however accurate. However you ignore the inherent problems with doing the sort of editing you suggest (bringing up the levels in the example you provide to cope with severe underexposure introduces other problems. RAW is no substitute for getting the exposure right in camera).
Note this is a fairly thin article that covers only one aspect of RAW's advantages and one that is only significant if you do a fair bit of manipulation in post. You are ignoring the colour management aspects (RAW allows you to use a fully-profiled workflow, including conversion profiles specific to individual cameras), the improved detail due to better optimization of demosaicing and sharpening that's possible with more powerful systems, the ability to pick a demosaicing algorithm on a per-image basis by switching converters, the ability to increase dynamic range via HDR and single-image pseudo-HDR, the improved noise control possible with certain converters, etc.
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