On 25 Nov 2004 at 23:06, DagT wrote: > No > > In some cases I�ve got some CA (or purple fringing) as you can see here: > http://www.photo.net/photodb/photo?photo_id=2478716
Thanks for pointing me to your example images, I assume you are pretty pleased with the lens? Also think it wise to consider CA and purple fringing to be related but not entirely the same. For instance CA often be virtually eliminated using PS CS RAW but a saturated fringe can still remain. The general consensus seems to be that this is a function of a particular sensor over-saturation phenomena known as bloom. A lot of my old E-10 images suffered this quite badly so I developed counter measures (it should be noted that I didn't have the benefit of the easy CA reduction that we do using PS CS RAW either). My method using PS was to magnify the image to a point where the whole offending pixels could be easily viewed then using the select > colour range tool click on the most saturated area of the bloom then side the fuzziness slider up to 150-200. The resulting selection will generally only encompass the offending (often purple) bloom which can generally be de-saturated using the hue/saturation tool rendering a far more natural image. 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
