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

"I dont see any advantage to using the Minolta spot meter. It is seredipity that the meter's highlight comp at +2.3 stops works for your camera+sensor combo"

I understood from this dialogue that the Minolta, when used in "highlight" mode to spot measure highlights, doesn't just compute exposure and then add 2.3 stops. I read the discussion as implying that the Minolta accurately gave a measure of the exposure required to expose the measured spot as a highlight be it 2.3 stops above mid grey or some other figure. My understanding is that this has nothing to do with "when sensors can handle +2.6 stops "next year,"" or any other +stops figure. Top of line digicams already have more than 2x2.6 stops of dynamic range. The point is you want an exposure reading that will for a given ISO (adjusted for any ISO calibration adjustment as discussed in this thread to put the camera back to actual ISO) simply place the measured spot at the highlight (read not quite clipped) end of the scale and the camera's dynamic range will determine how well it peers into the shadows from there. What am I missing?


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