10-28-2015, 11:41 AM
I must say, I admire a photographer able to handhold a Sigma 150-600 Sports. I tried a couple of times but prefer a gimbal head or monopod. However, in my hands Sigma's OS is steadier and more reliable than Nikons's VR (I, II or III)
Since the original question was about Tamron 17-50 on Canon I hesitated to answer. My experience was with Pentax and in-body-shake reduction. I was never happy with that combination. Nikon D7000 and Sigma 17-50/2.8 was in each aspect much higher IQ. Pentax with other Sigma's or Pentax lenses was also better than the Tamron combination.
Since the original question was about Tamron 17-50 on Canon I hesitated to answer. My experience was with Pentax and in-body-shake reduction. I was never happy with that combination. Nikon D7000 and Sigma 17-50/2.8 was in each aspect much higher IQ. Pentax with other Sigma's or Pentax lenses was also better than the Tamron combination.