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Patrick · 12-30-2008, 07:41 AM

Hello,

I got a Sigma 70-200mm 2.8 II EX DG APO MACRO HSM for my birthday, over a week ago. And at first I had no problems whatsoever, I loved the lens.
But starting today my lens doesn't focus automatically any more, and I can't even take pictures in AF. MF does still work and I can take pictures with it, but I want to use my AF again.

Can anyone tell me what is wrong with my lens?

Ben_Edict · 12-30-2008, 08:15 AM

Originally posted by Patrick

Hello,

I got a Sigma 70-200mm 2.8 II EX DG APO MACRO HSM for my birthday, over a week ago. And at first I had no problems whatsoever, I loved the lens.
But starting today my lens doesn't focus automatically any more, and I can't even take pictures in AF. MF does still work and I can take pictures with it, but I want to use my AF again.

Can anyone tell me what is wrong with my lens?

Obviously this is guesswork: Have you set the lens' focus collar back to AF, after using it in MF? Some Sigma lenses won't focus in AF mode, when the collar is still at MF.

(My Bigma is an example of this, whereas my old 70-200/2.8 does AF with the collar in any position.)

Ben

Patrick · 12-31-2008, 02:47 PM

Yeah, both are on AF.
What was strange was, I haven't changed the settings, and suddenly it didn't work any more as it has to do.

Ben_Edict · 01-02-2009, 04:17 AM

Patrick, if you really haven't changed anything, and not added a tele converter or something similar, in between the lens and the camera (some tc's block correct AF function, sometimes) it reads like a case for the Sigma service. Ig all other lenses work as usual, I would send the lens to Sigma.

Ben

Patrick · 01-02-2009, 03:07 PM

I have just sent the lens to Sigma and will receive it back within 6 weeks.

Ben_Edict · 01-03-2009, 02:03 PM

Originally posted by Patrick

I have just sent the lens to Sigma and will receive it back within 6 weeks.

Patrick, I don't know, where you sent it. But Sigma Germany seems to have a usual turnaround of between 6 and 20 days. I never needed their service, but that is, what I read from users in the German forums. So, may be they have given you a worst case estimate.

Ben

12-30-2008, 07:41 AM	#1
Patrick New Member Join Date: Jun 2008 Location: The Netherlands Posts: 3	K20D + Sigma 70-200 mm Problem Hello, I got a Sigma 70-200mm 2.8 II EX DG APO MACRO HSM for my birthday, over a week ago. And at first I had no problems whatsoever, I loved the lens. But starting today my lens doesn't focus automatically any more, and I can't even take pictures in AF. MF does still work and I can take pictures with it, but I want to use my AF again. Can anyone tell me what is wrong with my lens?

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12-30-2008, 08:15 AM	#2
Ben_Edict Veteran Member Join Date: Jul 2007 Location: SouthWest "Regio" Photos: Albums Posts: 3,309	Originally posted by Patrick Hello, I got a Sigma 70-200mm 2.8 II EX DG APO MACRO HSM for my birthday, over a week ago. And at first I had no problems whatsoever, I loved the lens. But starting today my lens doesn't focus automatically any more, and I can't even take pictures in AF. MF does still work and I can take pictures with it, but I want to use my AF again. Can anyone tell me what is wrong with my lens? Obviously this is guesswork: Have you set the lens' focus collar back to AF, after using it in MF? Some Sigma lenses won't focus in AF mode, when the collar is still at MF. (My Bigma is an example of this, whereas my old 70-200/2.8 does AF with the collar in any position.) Ben

12-31-2008, 02:47 PM	#3
Patrick New Member Join Date: Jun 2008 Location: The Netherlands Posts: 3 Original Poster	Yeah, both are on AF. What was strange was, I haven't changed the settings, and suddenly it didn't work any more as it has to do.

01-02-2009, 04:17 AM	#4
Ben_Edict Veteran Member Join Date: Jul 2007 Location: SouthWest "Regio" Photos: Albums Posts: 3,309	Patrick, if you really haven't changed anything, and not added a tele converter or something similar, in between the lens and the camera (some tc's block correct AF function, sometimes) it reads like a case for the Sigma service. Ig all other lenses work as usual, I would send the lens to Sigma. Ben

01-02-2009, 03:07 PM	#5
Patrick New Member Join Date: Jun 2008 Location: The Netherlands Posts: 3 Original Poster	I have just sent the lens to Sigma and will receive it back within 6 weeks.

01-03-2009, 02:03 PM	#6
Ben_Edict Veteran Member Join Date: Jul 2007 Location: SouthWest "Regio" Photos: Albums Posts: 3,309	Originally posted by Patrick I have just sent the lens to Sigma and will receive it back within 6 weeks. Patrick, I don't know, where you sent it. But Sigma Germany seems to have a usual turnaround of between 6 and 20 days. I never needed their service, but that is, what I read from users in the German forums. So, may be they have given you a worst case estimate. Ben

K20D + Sigma 70-200 mm Problem

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