Didn't realise we had a tamron engineer on hereIts Faulty??????:bang::bang:
Realspeed
It hasDoes it have a macro switch?
Both, also tried it off the camera.Is it doing this in manual mode or AF mode? try switching it to manual and see if it works ok, then try AF again.
Have you been using the focus ring without disengaging AF via the switch?
If you're sure about this my guess is that the switch has broken and the lens is stuck in the macro on position. When I owned one of these I always thought that switch seemed a bit flimsy.