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Subject: Re: raw 3.1 professional custom profiles for highend digital cameras



Actually, re-getting it, Jeff! I wonder how many times, how many iterations I have to go through....

In the engineering lab, I have no problems. I look at the data sheets, look at the results required and make it so. But as soon as the photographer's hat goes on...

To be fair, the learning curve to transfer thinking from linear to log was equally difficult. Teaching the concepts of exposure with such a dense process was daunting. Especially when the numbers were sometimes exponents, like f stops, and sometimes linear, like shutter speeds. That still holds, and is a anachronism, IMO. Who really needs to know the ISO number? Not me. Slow, medium and fast is all I need from a digicam. Even those names are anachronisms! I got several rolls of film sitting in my camera case. They are not going anywhere! So now, we shift gears in our heads.

Because I am still wedded to film, I won't be giving up the filmic way of thinking yet, so I do have some practice time available.

I completely agree with you about digicam methodology. I don't know what's to gain by the current thinking. Comfort? No way!

BTW, it's not correct to think of the Zone System pivoting around Zone 5. Were that so, the shadow density would actually decrease with extended development, which is how contrast is controlled. It increases, so the pivot point is actually about Zone 1. With PS, you can obtain the effect to which you are referring by pinning the curve at 128 and pulling up on the curve beyond 128. The curve below 128 will now decrease in values. Pulling up on the upper curve does not duplicate extended development correctly, but only approximately. To mimic film development with Curves is a bit more tricky, but possible.

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