expensive mistake ... or missing something simple?

[jmghart62]

Well, I have just unwrapped my beautiful new Sigma 70-200 2.8. It looks great on the camera, but there's a slight problem... it won't autofocus. Am I being very blonde and missing something ... or have I just forked out for a lens that is not compatible with my D80????

[mattyh]

AFAIK it should focus... are you sure the contacts are all lined up right (I'm not being sarcastic) it's worth checking, if not then it's possible you've got a duff lens. From a few things I've heard Sigma's quality control isn't exactly brilliant :thinking:

[Cobra]

Another daft solution is there a manual / auto focus switch and is it in the right position?

[jmghart62]

There is no auto/manual on the lens. AF is set on the camera so that's OK. Think contacts are OK. I did consider whether it was a duff one, but thought the chances of that were slim ... but maybe Sigma aren't so hot on quality control

[mmcp42]

do you know someone else with the same (camera) body who could try as well?

[StuD]

What camera do you own? AFAIK Nikon D40/D40Xs require lenses with motors in as they don't have motors in the body. I believe that's correct.

[mattyh]

or have I just forked out for a lens that is not compatible with my D80????

If you're anywhere near me you're welcome to put it on my D80, see if it's the camera?

[jmghart62]

Yeah, it's a D80, not a D40. I plan to take the lens and body into work with me tomorrow. We use D200s at work and I know they have the Sigma lens as well ... so I will try my lens on their body and my body on their lens ... hopefully that will tell me whether it's the lens or not. My logical brain is telling me they should be compatible ... it's not like it's an old F65 or anything I'm trying to use with it. But we'll see. Thanks for the reassurance *** ... my first thought was that I had just chucked my money down the drain.

[Snake Man]

I have the D80 and the Sigma 70-200 and can confirm it does auto focus. Stupid question but you do have the camera set to auto focus?

[Galaxy66]

I found myself in exactly the same position (apart from feeling blonde:)) with a Canon 24-105IS L it simply would not autofocus, tried cleaning the contacts etc, and each time it was attached it showed up as an "error". It was eventually accepted that it was a duff one and returned to the supplier for a replacement.

[jmghart62]

I have the D80 and the Sigma 70-200 and can confirm it does auto focus. Stupid question but you do have the camera set to auto focus?

Yep ... def set to AF. But I am delighted you have the same body and lens and they work together. Maybe I have just been unlucky to get a duff one