On 29 Oct 2005 at 21:58, Derby Chang wrote: > Hello learned brotherhood, > > I'm looking for some detailed instructions on chromatic aberration > correction. Are there any web pages anyone might recommend. Not Ken > Rockwell's pages, please :) > > Here's a dull but useful pic I'm working on to teach myself the basics > http://members.iinet.net.au/~derbyc/fringe/01.htm > > 3rd pic has the tweaks to the Lens Correction blue/yellow, and red/cyan > sliders as best as I could. Still pretty dis-satisfactional to me, so I > know I'm being a noob here somewhere. All guidance, hints and reprimands > appreciated.
Hi D, It seems like you have two problems here, a little CA but mainly bloom. Don't fall into the trap of trying to adjust for sensor bloom. Bad bloom is best tackled by reducing sharpening at the time of conversion then using a selective colour mask (use the dropper to select the bloom colour) then desaturate. I usually switch to quickmask before I do though just to make sure that any wanted area of the same colour isn't being desaturated. I don't know what method you are using to trim the lens CA but I've found it best to zoom too 100% or 200% and select an area in a corner with some contrasty detail. Then I hold down the "ALT" key whilst adjusting the sliders it's not too difficult to see when the adjustment is optimal. 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
