Lens problem: Sigma 70-200/2.8, advice please

Gary-360

Gary-360

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Gary
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I was on a fishing trip last night so took the camera and the Sigma 70-200/2.8 along (as you do ;) ).
Now, all was fine for a while, but after about 10 shots, the AF started "hunting" at <150mm. It really became quite noisy, like something was rubbing. It's always been a noisy AF so I was used to it.
I put it away, brought it out 30mins later, then the same again after a few shots.

It works ok up to around the 150mm mark, but will not lock above that.

Any ideas?

Gary

PS: no issues with any other lenses.
 
Thanks Neil, I've just emailed the service desk for advice. I've a 120-300/2.8 needing an FX chip so will get that done at the same time.

Gary
 
definatley a concern its been noises as mine is vertually silent. As quiet as my Canon USM lenses.
 
Just a wee update on this, the lenses arrived back a couple of days ago, AF is now silent on the 70-200 but it failed to find focus above 110mm. The 120-300 had been chipped but still showed the greyed out cropped area so both are away back again.
I've been informed that Sigma don't have a D3 to try these on and believed they were Ok.
I'll hopefully have them back (again) next week sometime, touch wood :(

Gary
 
Well it sounds like they fixed something at least, the focus on my 70-200 is as quiet as my canon USM lenses. I hear good things about sigma's customer service, so fingers crossed they'll live up to it, and sort your lenses out :thumbs:

Chris
 
Success!!!

The lenses were returned today and both are working as they should.

The 120-300 has an upgraded chip (for D40, D200 and D3), the 70-200 is focussing perfectly.

I'm a happy snapper again :D

Gary
 
Sigma tend to be excellent with repairs and turnaround.
 
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