So i purchased a use Tamron 24-70mm and am giving a it a test run. I feel like the focus is soft. Unless im not testing it correctly in my settings. I used spot focus and focused on the tear on the mat. What do you think? This is my first used lens purchase.

SOOC images.

At 24mm
24 by Joanne Sparrow Photography, on Flickr

At 35mm
35 by Joanne Sparrow Photography, on Flickr

At 50mm
50 by Joanne Sparrow Photography, on Flickr

At 70mm
70 by Joanne Sparrow Photography, on Flickr