Tamron 70-300mm macro lens suddenly has developed some kind of interface problem with the Canon T3i.

cleaning the contacts on lens and camera is about all you can do.
If its faulty and still under warranty then you'll need to send it back to where you got it from, any attempt to fix it yourself will void the warranty.

Hi this is problem of innner flex damaged so just replace this flex and its done

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Pic is attach only for your knowladge its not for your lens
Its like this

Simply clean your camera lens contacts

Here is a tutorial , how to clean your camera lens contacts

http://www.youtube.com/watch?v=wUt-K6w7lc0

Good luck and regards

Excerpted from a www.photo.net review of the lens:

Though the Tamron AF 55-200mm Di II LD Macro has "Macro" in its name, it's not really a macro lens. Maximum magnification is about 1/3 life size (Tamron spec it at 1:3.5) as you can see from the following image below, which was shot at 200mm and at the closest focus distance (0.9m/37.4"). This isn't too bad, but it's more of a close focus telephoto lens than a "macro" lens (bolding for emphasis added).

So, have you cleaned the contacts as you were advised? You do this by removing the lens and cleaning the contacts on the camera body and on the lens where they meet with a cotton swab lightly dampened with rubbing alcohol.

This is the kind of error which you always risk these days in buying lenses which are not from your camera manufacturer. Error 01 simply means that the camera cannot communicate with the lens. Canon's protocols are not open standards and third party manufacturers have to reverse engineer to produce something which works. As they're working in the dark, they cannot always arrive at a solution which makes all models suit all Canon bodies.

You have two possible solutions:-

Visually inspect the contacts on the lens and the camera body and if they're anything other than clean and bright then use a clean pencil eraser on them. Be very, very, careful not to let any of the rubber crumbs into the lens or the camera body.

If that fails, visit the Tamron website to see whether the lens can be returned to be updated for other bodies. if it can't then sell it and buy a later Tamron model or better still a Canon one. They may cost more, but the results are better and their resale value is much higher.

Clean the camera / lens contacts with a lint-free cloth

Error 01 means that communication between camera and lens is faulty. Try to clean lens contacts.

Try gently cleaning the electronic contacts on the lens's mount with an eraser. This will remove any mild oxidation on the contacts. If this doesn't resolve the problem, then contact Tamron and ask if there are any issues using this particular lens with a Canon 40D.

Hey shutterbug72,
According to the manufacturer the first thing you should try is cleaning the lens contacts with an eraser. If that doesn't work you could try removing the battery and reinserting it to reset the camera. It seems to me that if there was a compatibility issue going on you should have seen that from the start. As far as what lens you should buy both Tamron and Canon make very good lenses, but with Canon lenses you shouldn't ever have compatibility issues. I hope this helps!

Sincerely,
Allan
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