Third Follow Up: The Tamron 20-40mm f/2.8 Di III VXD. I was in my, “Respectfully what the heck?”, phase for my last post about this lens. I have moved on to settling in with the fact that that in short order this lens has shown itself to be a bit of a minor revelation. As … Continue reading Third Follow Up: The Tamron 20-40mm f/2.8 Di III VXD.