On 23/05/07, Andre Langevin <[EMAIL PROTECTED]> wrote:
> I found under typical adverse conditions huge
> blue fringing with my K10D and the only two
> lenses I have tried on it yet: Pentax 12-24 and
> Fujinon 400/4.5.  Is it normal?  Are some K10D
> sensors worse than others?  What can be done to
> correct it in PS?  Or using other software (in
> Mac)?

On the same lens the fringing may appear to be worse on the K10D than
the K100D in basic terms because there are physically more pixels
covering the same area. The best way to combat it is to try avoid
situations that encourage it. Removing it during post processing
generally leads to some image degradation however the results are
generally better than those where fringing is visible.

The best way to tackle the problem is to apply minimal sharpening
during RAW conversion, this will ensure that the edges of the
offending areas don't become over processed and more difficult to
remove. The offending areas can be selected using a color selection
tool and used as a mask for selective de-saturation. The mask can be
edited to exclude areas of a similar colour that you don't wish to be
affected by the de-saturation.

-- 
Rob Studdert
HURSTVILLE AUSTRALIA
Tel +61-2-9554-4110 UTC(GMT) +10 Hours
[EMAIL PROTECTED]
http://picasaweb.google.com/distudio/PESO
http://home.swiftdsl.com.au/~distudio//publications/
Pentax user since 1986, PDMLer since 1998

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