photography: how good do your lenses need to be?

photography: how good / sharp do your lenses need to be?

Olena, who I photographed during a recent individual workshop in New York. camera settings:  1/320 @ f/3.5 @ 800 ISO  (available light) I was trying out the new Tamron SP 24-70mm f/2.8 VC (B&H) for the images I shot during this workshop. (It comes in a Canon version too.)  It appears to be a fantastic  Read more inside...