I realize there are two versions of this lens (with and without image stabilization), so thoughts on either would be appreciated. To begin with, are Tamron lenses any good? I see they are much less expensive that Canon or Nikon, or even Sigma ... That usually does not bode well.
the build quality of the lenes isnt at the top, but they shoot good photo like others.
i would prefere the sigma 17-50 os