On 2 Jan 2005 at 17:17, John Francis wrote: > Or dou you mean the definite blue edge to the piece of bark on > the branch above the squirrel's head, towards the join with the > trunk? I don't know what caused that; it may be a lens defect, > or it may be a processing artifact, or it may even be correct!
I suspect there is a little edge related bloom in there too. > Apart from that, the only blue/purple fringing I see is around > branches well beyond the plane of focus. Which I suggest is lens CA due to the zoom lens non-linearities, it's obviously only corrected for the plane of focus. I find my good fixed tele-lenses sometimes exhibit similar problems when I use them in conjunction with TCs. 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
