[davidmanze]

That the already announced 70-200 and 150-450 didn't have stabilization was a dead giveaway that the IBIS is not going anywhere... one can get away with no stabilization in a 24-70 lens (Canon, I'm looking at you), much less in a 70-200 or an even longer telephoto. Dave, and concerning the price... Tamron does sell the Sony mount versions (with no apparent VC) for the same money as the Canon / Nikon ones. So we couldn't wait for anything different here.

  Well it's certainly a nice surprise, I was expecting it to be a couple of hundred bucks more expensive with the Pentax badge on  it, like it was with the Tamron 18-270mm. Still I think Pentax are staking out quite an investment here with the FF, the camera could be a make or break deal, they've got to go for sell sell sell,  I would hate to think what would happen if they got stuck on the shelves!