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Sigma APO 50-500mm F4-6.3 EX DG/HSM Lens Questions & Answers
On 250mm onwards the auto and manual focus do not
That is some heavy glass.. it sounds like there is a problem with the drive mechanism in the lens when the lens is extended. The droop from the weight of the glass prevents the mechanism to function as designed.
Since this is a precision optic, I would send it to Sigma or other reputable shop for a repair estimate. Attempting to disassemble this or contaminating interior parts would worry me too much for me to try it. Unless you know what you're looking for - I'd arrange for service by calling (1-800-896-6858) or contacting
Sigma Customer Support, package it up and send it out for repair. You might still be under warranty, too.
Good luck!
3/23/2011 8:18:57 PM •
Sigma APO...
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Answered
on Mar 23, 2011
My 150 - 500 lens will not extend or retract
I'd guess, from when this lens was introduced, that it is out of warranty? My web search did not turn up any reference to what you have described. Whether or not in warranty, I'd suggest starting by contacting sigmaphoto.com to see if they have any suggestions. FWIW, I have the (newer version) 50-500 OS USM on a 7D and am very impressed with it (first non-Canon lens I've bought).
10/16/2010 6:42:07 AM •
Sigma APO...
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Answered
on Oct 16, 2010
Bigma 50/500
Hey Bob G,
I would try blowing compressed air into the lens to try and dislodge whatever is stuck in the lens barrel. If this doesn't work I would advise you to not take the lens apart. Camera lenses require precise mechanical alignment that can only be achieved with the right tools and the education necessary for achieving it. It would probably be easy to take it apart, but very hard to put it back together. You could try a shim, but you run the risk of damaging the lens further. I hope this helps!
Sincerely,
Allan
Go Ahead. Use Us.
9/13/2009 4:43:41 PM •
Sigma APO...
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Answered
on Sep 13, 2009
Autofocus motor run but no focus
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
5/28/2009 4:58:27 AM •
Sigma APO...
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Answered
on May 28, 2009
Soft focus
I would say it is fixable. It could be a couple of different things. Loose optics and/or mount spacing could be the problem. Check here on Fixya to find a repair person in your area.
3/1/2008 1:54:26 PM •
Sigma APO...
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Answered
on Mar 01, 2008
Af-s compatable nikon D-40
You should be able to use any Nikon AF-S or Sigma HSM lens on your D40. If you want to be 100% sure, email or call Sigma from
www.sigmaphoto.com. They are generally very helpful with such issues.
1/25/2008 2:54:48 PM •
Sigma APO...
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Answered
on Jan 25, 2008
Zoom lock slide switch
It will only lock the lens in the 50mm position (for storage and carrying) or past 100mm (to keep the elements from making contact when using a tc).
11/16/2007 5:34:43 PM •
Sigma APO...
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Answered
on Nov 16, 2007
Where can I find out how to take apart a Sigma 150-600mm contemporary lens?
Taking it apart is not the problem - re-assembling it will be. Unless you have access to an optical laboratory, where laser instruments can measure the exact tolerances required, don't even think about it. You will be left with a pile of optical components, and a far higher repair bill than if you had just let the experts sort out the problem in the first place.
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