On Fri, May 11, 2012 at 9:51 AM, George Sinos <[email protected]> wrote:

> <http://www.luminous-landscape.com/reviews/cameras/leica_m9_monochrom.shtml>

> "This has not been possible till now because with the raw file from a
> colour capable sensor the white balance is indeterminate. Depending on
> how the raw file is subsequently processed one or more of the colour
> channels might be blown. But because the MM has no white balance a
> true raw histogram display is possible."

I was confused by this statement when I read it yesterday. It's true
that you can't show an accurate luminosity histogram for the raw file,
because that depends on the color balance chosen. But you *can* show
accurate histograms for each of the three color channels, to know if
any channel is blown in the raw data (i.e., has reached the saturation
level of the photosite). And that's usually what we're worried about
when shooting.

But as I understand it, all(?) the cameras on the market show the RGB
channels of the developed JPEG, which is not what you're worried about
when you're shooting raw. I don't understand why they don't show the
raw channels, and I don't think you need a monochromatic sensor to do
so.

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