Hi all,

I'm in the market for a new zoom lens. I have a Nikon Z6, Nikon D600 and a Nikon D7000 with a Nikon 24-70 F2.8, a Nikon 70-200 F2.8 and a Tokina 16-28 F2.8.

I live in central Utah, and I have access to a wonderful wetland full of water fowl. However, it is very difficult to get decent pictures with the above lenses. I'm looking at buying either the Sigma or the Tamron. Does anyone have any advice about which one they prefer?

Thanks