70-300G and CA

[Javelin]

People have reported that this lens doesn;t produce any CA. does that mean it can't? Is it possible to make any lens exibit this? the reason I ask is I have a few shots of geese against a bright cloudy sky. (late day smooth bright overcast)... the shots aren;t really exposed right but they all show purple edges starting when you zoom about 70-80%. not as bad as My BBC would have done but I wasn't expecting to see it. the sky was bright but these shots don't have the sun in them.

[David Kilpatrick]

It does produce CA. It's pretty good, but anyone who suggests it is entirely CA free is probably using APS-C only. I didn't spot any on APS-C, it's more visible to the edges of the frame on A900 - generally in extreme conditions wide open. There are not many teles around which produce LESS though, even the 70-200mm SSM f/2.8 throws up more CA.

David

[Javelin]

I took a few more tough shots today and theres no visible CA. shots the BBC would have messed pretty badly too