Re-chipping Sigma...
/forum/topic/1171710/0



ChrisCoy
Registered: Mar 05, 2011
Total Posts: 383
Country: United States

Has anyone heard of a problem where Sigma's lenses don't interact with the Nikon D7000 very well? My 24-70 HSM is "jumpy" and often back-focuses. It focuses, but it will sort of jerk back and forth a few times before it settles.

Someone mentioned having it re-chipped. Anyone else have this done? Did it fix the issue?



DTOB
Registered: Oct 07, 2010
Total Posts: 1359
Country: Canada

Have you tried cleaning the contacts?

I'd say send it to Sigma. Who knows what they would do to it, or if it would involve 're-chipping' (not sure what that would entail), but they would be your best bet.



EB-1
Registered: Jan 09, 2003
Total Posts: 22527
Country: United States

The newer lenses are flashable. However, I know that

EBH



Kerry Pierce
Registered: Feb 01, 2004
Total Posts: 3576
Country: United States

I don't recall having seen any posts about the d7k having issues with Sigma lenses. But, there are a lot of posts about AF problems, without identifying the lenses. I tend to believe that there are some bodies out there with issues.

My d7k doesn't work well with my Sigma 100-300 f/4 or 120-300, but it doesn't involve the jumping and jerking that you describe. The lenses just won't focus properly at any distance. I haven't bothered to test my other Sigma lenses or do anything with the d7k. It seems to work fine with a Nikon lens of 200mm or higher. I haven't sent the lenses in to Sigma because they work fine on all of my other bodies.

I know that isn't real helpful, but it's the best I can do for now.

Kerry



Bounce o1
Registered: Dec 19, 2008
Total Posts: 24
Country: Canada

i have the sigma 24-70 f2.8 pre hms & i will not work on my D7000 no focus at all
bounce



Airphoto
Registered: Jan 20, 2006
Total Posts: 572
Country: United States

Send to Sigma for repair / calibration