Цифровое фото: эксперименты с HDR

CC40m then custom white balance (I just stay with UniWB).

once again, leaving UniWB out of equation for now, lets see how CC40m works.

it attenuates green 1.6 times, having nearly no effect on reds and blues (given CC40m is from Lee or Schneider /they call it CC40p for "purple"/; other brands I have not tested.

D2X(s) when you set white balance to about daylight amplifies red and blue channels approximately 1.6 times. more here

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so what happens when you use CC40m for daylight and flash with D2X(s) is that (nearly) no white balance adjustments are needed.

what we achieve here is that CC40m under the above conditions essentially negates the need in using white balance multiplication.

to put it in a different way, when you shoot at ISO 100 in daylight your green channels are in fact IDSO 100 - while red and blue channels are amplified so that they are effectively behave as ISO 160.

keeping ISO at base for all four channels means extending dynamic range - now you can expose all four channels closer to the right. result is less highlight discoloration and less color noise in shadows, as well as more details and texture in both highlights and shadows.