On 22 Feb 2005 at 6:54, Fred wrote: > > CA is a function of the lens and can generally be minimized to the point > > that it's no longer visible using RAW tools such as PS CS RAW or in a RGB > > image format using PanoTools or similar with generally reasonable results. > > So, what are the symptoms of the latter, then, Rob?
CA (lateral chromatic aberration) is denoted as colours splitting and becomes most obvious the further from the centre of the frame. It's remedied by applying a transform to each colour layer that will shrink or increase the magnification of each layer relative to the centre of the frame in order to bring them back into registration. A good article is available here: http://www.caldwellphotographic.com/TutorialsDistortionAndColorFringing.html It's handled much better in the PS CS RAW convertor. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
