On 3 Jan 2005 at 14:27, John Whittingham wrote: > On close inspection of the image there appears to be very little if any > colour fringing of the in focus image, suggesting that CA is not the culprit. > > I used to get a little CA on images taken with a 'K' 300 f4 of Superbike > racing in the UK, now completely abscent using a Sigma 300 f4 APO even with a > 1.4x EX TC attached.
Just because CA isn't evident at the plane of focus doesn't mean it's not a form of CA, it's certainly not a bloom artifact in the image under scrutiny. 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
