I always thought that purple fringing was Chromatic Aberrations and is caused by the fact, that glass will break different colours (wave lengths) differently. APO-lenses are dealing with this, in order to assure that all colors (wave lengths) from the same spot in the subject hits the sensor/film in the same spot, thus don't "seperate" - don't cause fringing. The posted lens test seem to indicate, that APO lenses don't cause much Chromatic Aberrations and that "ordenary" lenses causes CA, especially if not stoped down. Aren't APO lenses equiped with aspheric lens elements?
Jens Bladt Arkitekt MAA http://hjem.get2net.dk/bladt -----Oprindelig meddelelse----- Fra: Jens Bladt [mailto:[EMAIL PROTECTED] Sendt: 6. juli 2005 10:31 Til: [email protected] Emne: RE: F 70-210mm 4.0-5.6 This was done with the F-4-5.6/70-210mm @ 135mm, F.5 (open): http://www.flickr.com/photos/bladt/24003227/ Regardes Jens Bladt Arkitekt MAA http://hjem.get2net.dk/bladt -----Oprindelig meddelelse----- Fra: Jens Bladt [mailto:[EMAIL PROTECTED] Sendt: 6. juli 2005 00:18 Til: [email protected] Emne: SV: F 70-210mm 4.0-5.6 Congrats Joaquim. It really is a lovely lens. I shot this a few days ago with one of these: http://www.flickr.com/photos/bladt/23452893/ Jens Bladt Arkitekt MAA http://hjem.get2net.dk/bladt -----Oprindelig meddelelse----- Fra: Joaquim Carvalho [mailto:[EMAIL PROTECTED] Sendt: 4. juli 2005 19:43 Til: [email protected] Emne: F 70-210mm 4.0-5.6 I'm feeling happy. This morning I got the F 70-210mm 4.0-5.6 zoom I bought on Ebay and did some preliminary tests. It is very very good: - even wide open at 210mm it clearly outperforms the *ist CCD - it focuses fast!
