Canon 7d lens error clean contacts.

Started May 10, 2012 | Discussions
Ironmanbud1940
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Canon 7d lens error clean contacts.
May 10, 2012

Canon 7d lens error clean contacts. How can I get the lens to work better I have the sigma 18-250 is lens. I love this lens and don't want to loose this good lens!

MI6gunny
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Re: Canon 7d lens error clean contacts.
In reply to Ironmanbud1940, May 10, 2012

I've seen some guys chime in saying go over the contacts with a vinyl eraser. Try it perhaps, maybe on the lens as well. If not perhaps its time to give that Sigma warranty a try
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MisterPootieCat
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Any other lenses?
In reply to Ironmanbud1940, May 10, 2012

Ironmanbud1940 wrote:

Canon 7d lens error clean contacts. How can I get the lens to work better I have the sigma 18-250 is lens. I love this lens and don't want to loose this good lens!

Do you own and use other lenses without getting this error message? If so, then the problem would seem to be with the Sigma lens. I would try wiping the contacts on the lens with a microfiber cloth to see if that helps.

I seem to recall Sigma users were getting this error when the 7D was released. Have you tried to give Sigma a call?

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elfroggio
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Re: Canon 7d lens error clean contacts.
In reply to Ironmanbud1940, May 11, 2012

Ironmanbud1940 wrote:

Canon 7d lens error clean contacts. How can I get the lens to work better I have the sigma 18-250 is lens. I love this lens and don't want to loose this good lens!

I have a similar problem with my Sigma 120-400 OS. The AF does not work, it just goes back and forth. There is some kind of very thin oily film that forms on the contact. It only happens with the Sigma, I have a few other Canon lenses and they are not affected by it, so it must be from the Sigma lens.

To make it work properly, I clean the contact on both the lens and the camera with an LCD cleaner solution that I spray on a lint-less cloth. Then it works without any problem.

Being in Canada, I have a 10 year warranty, so I will send it out for repair in July/August when I won't need it.

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Robert Sheldon
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Re: Canon 7d lens error clean contacts.
In reply to elfroggio, May 11, 2012

The problem is not just Sigma. I have a Canon 1.4X Mk II TC that is giving me the same error signal. Other TCs (Kenko and Tamron) work fine on the camera. The Canon TC had worked fine for several years.
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Ronald Woan
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Re: Canon 7d lens error clean contacts.
In reply to Ironmanbud1940, May 11, 2012

The two times I started to experience this I had to send the lens back to Sigma for service. I think they just replaced the circuit board each time.

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Ironmanbud1940
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Re: Canon 7d lens error clean contacts.
In reply to Ronald Woan, May 18, 2012

Did they charge for the repare. I am told I have a lifetime warranty because the dealer is a arthorized dealer for sigma.

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Ironmanbud1940
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Re: Canon 7d lens error clean contacts.
In reply to Ironmanbud1940, May 18, 2012

Thanks for the replies.

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