Lens Consolidation Follow Up: The Tamron 20-40mm f/2.8 Di III VXD. I recently wrote a post about this lens change. The goal was to replace the lenses above with the 20-40mm. While I am happy with it I am still getting my head around the 20-40mm. Here are sample images followed by my first thoughts. … Continue reading Lens Consolidation Follow Up: The Tamron 20-40mm f/2.8 Di III VXD.