Hello everyone. I'm new to the digital camera world with a nikon D200. Just got back from vacation using an APO 70-210mm F2.8. It worked fine but, when my sigma 1.4ex teleconverter was used I lost my autofocus.

Currently I'm trying to find a replacement for this lens and was looking at the Sigma APO 70-200mm F2.8 Ex DG HSM. From the Sigma web sight it looks like the 1.4ex and 2.0ex teleconverters is A/F compatable.

Has anyone had any compatability issues with this lens and the D200?
Any feedback reguarding this lens would be greatly appreciated.

Thanks in advance

RedRider