On February 4, 2004 10:47, Chuck Norcutt wrote:
> Perhaps the lens design can over-correct for chroma thus causing chroma
> to appear in the center rather than the edges? Then my next question is
> whether the chroma in the center of the 90mm image is due to the lens,
> the sensor or the combination. Have you ever seen it on film with the
It may not be the lens: The highlights seem to be from highly curved
transparent surfaces (water), where a combination of dielectric reflection
and refraction (into the water) is taking place. Since the reflection and
refraction are dependent of the index of refraction, they will spectrally
disperse the incident light, and the image may simply be showing this
dispersion.
To see chromatic aberration caused by the lens, it is better to look at
in-focus, high contrast edges in a non-specular image.
--
Parzival Herzog
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