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ericbowles

Atlanta, US
10539 posts

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"RE: Active D- Lighting - recreating ADL in post"

ericbowles Moderator Awarded for his in-depth knowledge and high level skills in various areas, especially Landscape and Wildlife Photoghraphy Writer Ribbon awarded for for his article contributions to the community Donor Ribbon awarded for his very generous support to the Fundraising Campaign 2015 Nikonian since 25th Nov 2005
Sat 04-Feb-12 12:40 PM

Bob

I don't think it's possible to eliminate the exposure adjustment in post. It is an actual change in exposure and exposure is baked in at the time of shutter release. The Exposure slider or any other post adjustment is giving an effect of changing exposure but it comes at the expense of noise and other artifacts of amplification.

What you can do is change from ADL High to ADL Low, which leaves the image underexposed by 2/3 stop and applies a less aggressive curve or algorithm. You could also change from ADL Low to Off, which would remove the adjustments and leave an image with no effects of ADL and the same exposure.

The practical side of moving from ADL Low to ADL High in post would be to darken highlights a little. My test images showed a difference in the pixel value of about 5 per step, so the impact of Low to High would reduce the bright pixel value by about 10. There is a change in the dark end of about 1 per step so the change would mean and increase of the black pixels of approximately 2. This leaves the blacks dark and tries to protect highlights. I did not measure midtones, but the visual effect is to brighten midtones and medium shadows.

For the sake of discussion, what steps would you use in post to create the equivalent benefit of ADL?


Eric Bowles
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This is a hot, active topic! Active D- Lighting [View all] , ericbowles Moderator Awarded for his in-depth knowledge and high level skills in various areas, especially Landscape and Wildlife Photoghraphy Writer Ribbon awarded for for his article contributions to the community Donor Ribbon awarded for his very generous support to the Fundraising Campaign 2015 , Thu 02-Feb-12 09:10 PM
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