I'd like to hear from those who have used the Series 1 90/2.5 macro. I know it has an excellent reputation, but I wonder how it fares regarding CA's. I'm looking at picking up an M42 mount and adapter to use on a Sony A900. Thanks for the input.
I have a very clean copy in OM-mount. I love the results and the CA is low. I should be said though, I do not shoot stuff that can cause CA like computer stuff. I mainly shoot flowers.