V1.02
Thom Hogan’s Complete Guide to the Nikon D300
Page 405
gets only one calibration point for all focal lengths.
Fortunately, you
can
calibrate for multiple lens and TC
combinations.
•
Watch for overlapping lens IDs.
You only get one
calibration per lens number. Thus, if you’ve got multiple
85mm f/1.4 lenses (and who doesn’t?
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) you need to use
List saved values
after you calibrate the first one to set
different lens numbers for each of them.
Chromatic Aberration Correction
When you shoot JPEG and TIFF images with the D300, the
EXPEED image processing system automatically removes
lateral chromatic aberrations.
A chromatic aberration is the result of different wavelengths of
light focusing at different points after going through a lens.
These show up in images as color fringes, and are especially
noticeable at high contrast edges. Two types of chromatic
aberrations exist: longitudinal and lateral (sometimes called
transverse). Longitudinal aberrations are those where
wavelengths focus at different depths relative to the focal
plane, while lateral aberrations are those fringes that occur
across the focal plane.
Top is longitudinal, bottom is lateral
Specifically, lateral chromatic aberration usually shows up as
a blue/purple fringing on one side of edges and a red/green on
the other.
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As Foghorn Leghorn used to say “I say, that’s a joke son.”
