Upload & Sell: Off
Update: Tamron Japan Customer Service has responded to my email, asking for further details, which I did. I also suggested they test the lens on a 7D & 1D Mk IV, in AI Servo, in the 450-600mm range, and with the shutter button held half-depressed as they focus on a distant subject then swing to focus on a nearer subject.
My lens and 7D body will arrive at Tamron NY, today for testing by Pat Simonetti. We all should know something by mid week, being a officer in a large camera club I was also able to test two other 7D bodies all having the same results, tacking problems in Aiservo and constant focus pumping in order to achieve in focus images on BIF.