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

I assume when you say that digital is way more sensitive to red and IR it's the sensor output, before digitizing, to which you refer. The engineering battles must be interesting to deal with it!

As a person far more attuned to shadow placement than highlights, at least in the capture mode (You "place" the shadows, the highlights "fall") I find it disconcerting in the very least.

I keep forgetting the log/linear aspect of digital capture! Zone 5 would be about 50 idealized. Maybe as low as 32 as there is no baseline film base+fog issue to set the black point.

The more I think about it, the more I can see that you must start at the MSB and get that correct first, then work down. And, it makes no difference whether we are in an 8 or 16 bit environment. It still applies, for it is the dynamic range of the sensor which has to be handled correctly. As I recall, the same held true in digital audio. At least there, the mistakes would be painfully obvious!

Some of this also makes sense for scanning, although one actually makes visual decisions right from the get-go. No concerns over ISO, white point etc. And, I would imagine the linearity is much more controlled.

Thanks, Bruce and Jeff, for getting back so quickly!

Enjoy the holiday! :-)


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