Sigma 17-35 HSM EX: No Auto focus on 10D

[MesaMan]

Alright everyone, just got some new glass - Sigma 17-35mm f2.8-4 HSM EX.
Get it on my 10D, and the auto focus doesn't work.

I was wondering if this is a problem for other 10D/Canon users? What can I do about it?

I hear that you can change/upgrade :scratch the "chip" in the lenses. If true is this expensive?

So many questions, I hope someone can help me.
Many thanks,
-Rob-:huh

[JimM]

Does the auto focus work at all? I had a similar problem... see this thread:
http://www.dgrin.com/showthread.php?t=28587

[MesaMan]

Hi Jim,

Thanks for your reply, before posting this topic I ran a search and found that thread. It is NOT this problem - the AF does not work at any aperture and is not turning the ring at all.

The lens looks like it could be a good 'un apart from no AF.... GGrr

:dunno

[JimM]

Did you buy it new or used? How old is this lens? Looks like this lens should be compatible. Is this the lens (http://www.sigmaphoto.com/lenses/lenses_all_details.asp?id=3258&navigator=1)?

[MesaMan]

Hi Jim, It's secondhand and the same as the one pictured although it's not the DG and it's the larger 82mm filter version. I believe this to be older?

-R-