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 Post subject: lens repair question
PostPosted: Sun Feb 06, 2011 7:05 pm 
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Joined: Sun Sep 21, 2008 5:32 pm
Posts: 24
Hi there,

asking those who has experience in lens repair. My sigma lens seems to have the aperture motor failure, the aperture blade will jump around whenever I tried to focus, then the camera body will have a 'contact error'.

Can I fix it without replacing any components? Could it be a simple circuit contact problem or do I need to replace the motor?

thanks


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 Post subject:
PostPosted: Sun Feb 06, 2011 8:15 pm 
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Joined: Sun Aug 29, 2010 11:52 am
Posts: 861
Location: Surrey, UK
If you have any doubts about your lens send it back to sigma. Most camera companies have very good customer service because of how valuable the items are. You may have to pay for shipping but that is a small price to pay if there is a problem. By the sounds of it your problem seems pretty severe. Is it still in warranty otherwise you may have to pay.

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Camera: Canon 550D with battery grip
Lenses: Canon 24-105mm f/4L, Canon 50mm f1.4, Canon 18-55mm, Tamron 70-300mm,
Accessories: Manfrotto 055XPROB with 808RC4 head, Canon 430ex II speedlite, Lowepro Nova 180AW and Lowepro Pro Runner 450AW


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 Post subject:
PostPosted: Mon Feb 07, 2011 5:13 am 
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Joined: Sun Sep 21, 2008 5:32 pm
Posts: 24
thanks for response. No there's no more warranty. I have been fixing a lot of simple problem in lenses and modified some therefore I want to try repairing it myself.

check out my youtube channel for some video on lens modification
http://www.youtube.com/user/witonohalim?feature=mhum


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 Post subject:
PostPosted: Mon Feb 07, 2011 7:38 am 
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Joined: Sun Aug 29, 2010 11:52 am
Posts: 861
Location: Surrey, UK
haha nice youtube channel! If you can't fix it then I would send it back an aperture motor failure is quite a big problem.

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Camera: Canon 550D with battery grip
Lenses: Canon 24-105mm f/4L, Canon 50mm f1.4, Canon 18-55mm, Tamron 70-300mm,
Accessories: Manfrotto 055XPROB with 808RC4 head, Canon 430ex II speedlite, Lowepro Nova 180AW and Lowepro Pro Runner 450AW


Oh that is so lame, every hot girl who can aim a camera thinks she’s a photographer -Stewie Griffin


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 Post subject:
PostPosted: Mon Feb 07, 2011 1:29 pm 
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Joined: Mon Sep 13, 2010 7:01 pm
Posts: 1227
Location: NW England
Great clip raydream. :wink:

I was actually expecting, at the end, for 1 small screw to be left over! :twisted: ......so have start again. :lol:

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Image btw,He who dies with the most toys, WINS!
Nikon D800E & D700 bodies + Nikon 200-400mm F4 VR1, 50mm F1.4G, 16-35mm f/4G VR, 105 F2.8 VR macro, 70-300mm lenses. A couple of filters, Giotto tripod & ballhead. Lowepro Slingshot 302 AW
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 Post subject:
PostPosted: Mon Feb 07, 2011 6:29 pm 
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Joined: Wed Apr 21, 2010 11:25 pm
Posts: 215
Location: Lower Hutt, New Zealand
I look at this video with the same horrified fascination that I have for the brave but crazy people who jump off tall buildings with a parachute. If I attempted such a thing I would lose bits, and probably never get it back together and would have an embarrassing box of bits tucked away for ever.

Congratulations on the skills and bravery/folly of even putting a tool near your lens.

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Brian,
Canon 5DII, 7D, EF-S 10-22, EF 50 USM 1.4, EF-S 60 macro EF 16-35 L USM, EF 24 -15L IS USM, EF EF 100-400L, Canon SX130


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 Post subject:
PostPosted: Tue Feb 08, 2011 5:37 am 
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Joined: Sun Sep 21, 2008 5:32 pm
Posts: 24
@jameswilby5

Thank you for the advice. It appears that the failure was due to cold weather on the mountain, it seems to be working fine now. In any case I think I will send for repair if the motor failed again.

@oldCarlos

Yes it happened before! Hahhaha



@Brian Harmer

Thank you! I am sort of addicted to tearing things apart now after my first success attempt :)


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 Post subject:
PostPosted: Tue Feb 08, 2011 11:18 am 
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Joined: Mon Sep 06, 2010 11:30 am
Posts: 212
Location: Phnom Penh
O.O, i would not even take one screw out of my lens.
nice! i hope u never destroy ur lens. :)

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Canon EOS 7D + Red Canon IXUS 300HS.
Canon EF 17-40mm f/4L,Canon EF 100mm F/2.8L IS USM.
Sigma 70-200mm F/2.8 APO EX DG OS HSM, Sigma 50mm F/1.4 HSM
Canon Speedlite 480EX II + Tripod+ B+W MRC (2x77+67), hoya HD UV (77) B+W MRC 77mm(CPL slim+10 ND).


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