Here are a couple samples of the Tamron 70-200 2.8.
First are 88mm at f2.8 and f 4. Second set are at 200mm at f2.8, f4, f5.6. No Post processing, straight from camera, thus a little underexposed.
https://www.flickr.com/photos/116361123@N04/sets/72157649483779306/
Due to the lighting I underexposed 1 stop as anything else would blow out the highlights. Very sharp lens, some CA at 200 f2.8 but cleans up after a 1/3 stop at f3.2.