Change your VR unit
SOURCE: will not autofocus
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
Go Ahead. Use Us.
SOURCE: Tamron 200-500mm lens on Canon 40D ... when I put
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.
SOURCE: Detaching Lens Hood
I'm not sure of the exact model number of your lens, but the hood should have a bayonet flange and rotating it in one direction or the other should allow it to then simply pull off.
SOURCE: My Canon 400D Camera keeps coming up with error 99
Hi turn on the camera with the lens on set to tv and a iris of f22 and use the stopdown button if the lens stops down the lens is ok if not the lens is faulty may need a intuper replaced
Testimonial: "Many thanks for your help with this problem. What is a Intuper? I have never heard of this before."
SOURCE: Tamron Macro 90mm lens r07 error on Nikon D70S -
Having gone over threee months without a response, I assume this is no longer a problem.
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