I am trying out a bit of software called DxO Optics. This automatically corrects for distortion, softness and CA according to your camera/lens combination.
It seems to work well for my 400D and 24-105, but the 100-400 module isn't available yet for the 400D.
I would be really grateful if someone could send me a couple of
unedited shots taken with the Canon 100-400mm IS on one of the following cameras :
350D
10D
20D
30D
1D Mark II
1D Mark II N
1Ds
1Ds Mark II
5D
Preferably a small and colourful bird (blue tit would be ideal) taken at 400mm with that characteristic softness you get from this lens at full tele.
If anyone is willing to help, please PM me, I will gladly share the results of my test.
Thanks
Chumley