New Sigma lens auto focus trouble

[Eventer]

i just brought a new Sigme lens (18-200mm f/3.5-6.3) Brand new looks real nice havent had a Sigma lens before but I was impressed with the first imression, nice weight to it, felt pretty goood etc.

Put it on my D7000 - Wont auto focus... it:
- ****s around for a good 10seconds and when it does find a "focus" to lock on, it actually not focused at all.
- It jumps around back and forth (sometimes finding the focus but never locking onto it.
- it will continue to try find a sucject for as long as i half hold the shutter button down.
- Tried under lots of different light sources, bright indoor lighting, outdoor cloudy etc (havent tried it in bright sun yet)

Ive played around with setting, like everything?! Im at a loss. Is it faulty? surely Sigma cant sell a lens this crappy it doesnt focus?

Im confused... please help!

 

[sleist]

Call Sigma. They can take of this easily. I believe I read that there were some issues with older non-nikon lenses and the new AF system in the D7000.
If I remember correctly, it can be fixed easily, but you may need to send the lens and possibly the cam in to Sigma for adjustment.

Steve

 

[Eventer]

Thank you so much! will call them tomorrow ... as soon as I can find a New Zealand contact number

 

[DiskoJoe]

next time read some reviews about a lens before you buy. This would have probably been addressed somewhere is it is a known issue.

 

[Geaux]

Yeah, send it in to Sigma, you'll get it back in a few weeks better than ever.

 

[KmH]

One of the problems with buying 3rd party stuff is they have to reverse engineer the electronic communications, and forward compatibility sometimes suffers.

Sigma needs to re-chip the lens, so it can 'talk' to your D7000.

 

[Eventer]

next time read some reviews about a lens before you buy. This would have probably been addressed somewhere is it is a known issue.

I actually did - Didnt read this anywhere - But yeah I'm sure its written somewhere just missed it... Quite obviously lol