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+1EV as a 'Next Step' |
+1EV as a 'Next Step'
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Plus One EV: The 'problem' is that within Capture NX, the only way
to currently adjust EV is as a RAW Adjustment.
And because Nikon uses a custom tone curve, that greatly complicates
creating a "+1EV" Adjustment.
However, by observing the behavior of EV compensation on a photograph,
the underlying gamma+tone curve Nikon uses can be deduced.
The 'Levels & Curves' that you see to the right is a very close
approximation of '+1EV' as a next step -- and while it is not perfect,
for most things, it works incredibly well.
For example, to recover a blown window hilight, you apply minus EV compensation
as a RAW adjustment, and then use D-Lighting to recover. However, the problem
in doing this is that D-Lighting shifts colors when recovering from a large EV
compensation. A workaround is to instead use this custom curve to recover the
photo.
In the example below (original photo left) a blown window hilight was
recovered using EV compensation and (1) D-Lighting (upper right) vs
(2) two back to back "plus one EV" curves, excluding the window area
(lower right):
Hopefully Nikon will realize the benefits of adding 'EV compensation'
as a next step, and add that feature into a future Capture NX version.
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