Question about Sigma APO 50-500mm F4-6.3 EX DG/HSM Lens

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Autofocus motor run but no focus

My Sigma 50-500 and Pentax K200d worked beautifully, the other day I went to take some pics but the motor runs but there is no focussing

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  • Anonymous Dec 29, 2008

    Auto Focus motor runs, but will not focus. Sigma 50-500 for Minolta/ Sony.

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Found this myself check manual focus ring (closest to camera) maybe ring has moved to "manual"position. This ring moves backwards and forwards between "manual" and "auto" and may need pushing home completely

Posted on May 28, 2009

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Clean the lens at both the sides, the mounting end and the front end.
I had the same problem and got it cleaned to get it working back.
Its bcz the sufficient light entry will be cut when dust accumulates.

Posted on Feb 21, 2009

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1 Answer

Pentax k200D auto focus manual focus button not working


Discover the location of the problem by elimination if you have a spare lens. If the second lens does not auto focus the problem is on the camera or connections to the lens. If the second lens works correctly then the first lens is faulty in the focus area. I hope this helps to target the source of the problem.

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What make and model camera? Which Sigma lens? Do you have autofocus turned on, both on the camera and the lens?

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I have the sigma 70-300mmD i just bought for my nikon D40 and i am having trouble with the auto focus. it will not autofocus can anyone tell me what i am doing wrong and or where i can download the...


The Nikon D40 does not have an autofocus motor, relying on the lens having one. This Sigma lens does not have such a motor, relying on the camera having one. Nikon designates lenses with an autofocus motor AF-S, Sigma calls theirs HSM.

Dec 17, 2010 | Sigma f/NIKON- 28-90/3.5-5.6 Aspherical...

1 Answer

I am thinking about getting a Nikon D3000 or D3100. Will my Sigma DL Macro Super 70-300 and Sigma 28-80 D work with these cameras.


If those lenses have a Nikon mount then they will fit on the D3000 and D3100. However, the D3000 and D3100 lack a focus motor. If the lens does not have the focus motor then you will not have the autofocus capability. Sigma calls their focus motor the HSM; if the lens does not specify HSM then they do not have the motor.

Dec 12, 2010 | Sigma AF 70-300mm f/4.0-5.6 DL Macro Super...

1 Answer

Bought a Sigma DG 70-300mm 1:4-5.6 autofocus for my Nikon D40. When the lens is attached the settings get locked on MF. Is there anything I need to adjust to fix this problem? Charles


The Sigma 70-300mm f/4-5.6 DG will not autofocus with the D40 since the lens does not feature an internal focusing motor (HSM). The D40 does not have an AF motor in the body and hence it can autofocus only with lenses featuring an integrated motor (eg. Nikon AF-S lenses, Sigma HSM lenses, Tokina DX II series etc). Unfortunately you can use the said lens only in MF mode.

Sep 02, 2010 | Sigma 70-300mm f/4-5.6 DG Lens

2 Answers

Washed out pictures


set auto and take pics if pics are washed out adn dis colored and streaked then

CCD failure !

call Pentax i think they will do it free of charge it is a known problem in thousands of cameras just give them a call

http://www.pentaximaging.com/support/

Mar 22, 2009 | Pentax K200D 10 Megapixel Digital SLR...

1 Answer

Nikon d40 wont autofocus


Your 28-90 AF-D lens can't autofocus with the D40, which requires AF-S lenses with a focus motor in the lens. Sigma lenses with "HSM" (HyperSonic Motor) in the name also have the focus motor.

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5 Answers

Pentax K200D Digital SLR - Error Message "f - - "


This can also happen when the lens have an aperture adjustment ring, and it is not set to the "Auto" setting ("A", on my Sigma)/

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