$1800-$2000 at http://SDP.io/T35150
Nikon 24-70 f/2.8: http://SDP.io/N2470S
Nikon 70-200 f/2.8: http://SDP.io/Z70200
Sony 70-200 f/2.8: http://SDP.io/S70200G2

Tony Northrup reviews the Tamron 35-150 f/2-f/2.8 Di III VXD zoom lens for Nikon or Sony mirrorless cameras. At the wide end, he compares it to the Nikon 24-70 f/2.8. At the long end, he compares it to the Sony 70-200 f/2.8 GM II and the Nikon 70-200 f/2.8 S.

These unbiased, unsponsored tests show that the lens is incredible. The sharpness is good throughout the range, though it's stronger at the wide angle end than it is at the telephoto end. The contrast is BETTER than Sony or Nikon.

It does have a few drawbacks. First, you can't use it with a teleconverter (on either Sony or Nikon cameras), so it's a better choice for court-side sports like basketball and volleyball than it is for field sports like soccer and football. On Sony cameras, the FPS will be limited to 15, so you won't get the most out of it with your Sony a1 or Sony a9 III.

Also, when working at close range, it has pretty severe focal shrinking/focus breathing. When zoomed to 150mm at close range, you actually get more like 110mm. Additionally, the maximum magnification is worse than either the Nikon or the Sony.

Still, this lens shines because of the extremely useful focal range of 35-100. Paired with a 16-35, your "holy trinity" of lenses is shrunken to just two lenses. As a walking around lens, 35-100 is about perfect. The lens is pretty big, however, and also pretty expensive.

0:00 Introduction
0:11 Focal Length Range (Zoom)
0:36 Fast aperture
1:25 Sports Photography
2:52 General Photography & Travel Photography
3:52 Sharpness
5:35 Contrast
7:17 Focal Shrinking / Focus Breathing
9:19 Bokeh
10:35 Maximum Magnification
11:04 Summary