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sticking motor sigma 150-500 lens

manorjim 15 5 United Kingdom
24 Jul 2011 8:26AM
hi just got back from a walk,half way round my sigma lense (on a nikon d80)decided it was not going to a/f any more,changed the battery worked for a minute then started doing it again.any suggestions to what it is or what i can do
cheers jim
franken Plus
20 5.6k 4 United Kingdom
24 Jul 2011 8:44AM
Have you tried a different lens on the camera in order to check that its not the lens that's malfunctioning?

manorjim 15 5 United Kingdom
24 Jul 2011 1:46PM
just tried a smaller lense works fine,looks like the sigma lense needs looking at (not happy)
cameracat 19 8.6k 61 Norfolk Island
24 Jul 2011 3:40PM

Quote:like the sigma lense needs looking at (not happy)

Send it straight to Sigma, Make sure you contact them first and arrange it, But don't take any " Bull " from them, Some copies of this lens had a problem in the AF electronics area, A known faulty part that should have been pulled in on " Recall " , So no nonsence they should fix it under warranty conditions, Even if that warranty is out......Smile

I use the same lens, Mine has not been any bother at all....Grin But a pal of mine had this same issue with a brand new one, Hence the above information.....!!!

Good luck as its a fab lens when working correctly....Wink

EDIT: From memory it was sumfin to do with the AF/MF switch gear.....Whatever the parts used in some copies where of a found to be faulty batch.....!!!!!!!
andyrat1 10 1 United Kingdom
4 Jul 2012 9:10AM
I've just had exactly the same problem with my Sigma 150-500 lens on my Nikon D80. Autofocus would work, then it would fail and get error message --F-- in viewfinder. Switched everything off and powered up again and made no difference. Tried lens on another Nikon Body (D50) and was exactly the same. Have had the lens 18 months and have had no problems until this last few weeks when the problem was intermittent. Have got other lenses which work fine on the same camera bodies.
Lens has now been sent back to Sigma under warranty for repair. Was told it would take about 4 weeks!
NEWMANP 15 1.6k 574 United Kingdom
4 Jul 2012 4:33PM
This is a well known fault from new, you need to get it fixed straight away. they actually did a recall on all these lenses some time ago. mine was among the first to have the problem

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