On Wed, 16 Mar 2011 19:16 -0700, "John Celio" <[email protected]>
wrote:
> I opened the file in Photoshop CS4 Camera Raw and saw nothing wrong with
> the 
> sky. 


I also can't see any pixellation issues using CS3.

However, opening the image in the Pentax Digital Camera Utility 4, I
think I'm seeing what you describe when viewed at 100%.  There seems to
be a definite banding type pixellation across the sky.  It's subtle, but
it's there.  I've no suggestion as to why your CS5 is showing the
problem while CS3/4 isn't.

Looking a a couple of my own 'blue sky' images, I'm not seeing the
pixellation in either CS3 or the Pentax software, although I'm using
Adobe RGB not sRGB colour space.

I wonder whether you might try Adobe RGB and see whether that makes any
difference.


Cheers

Brian

++++++++++++++++++++++++++++++++++
Brian Walters
Western Sydney Australia
http://lyons-ryan.org/southernlight/
-- 


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