Here are the specifications of the new Tamron 20-40mm f/2.8 Di III VXD lens for Sony E-mount courtesy of B&H Photo: E-Mount Lens/Full-Frame Format Maximum Aperture: f/2.8 VXD Linear Motor Focus Mechanism Minimum Focusing Distance: 6.7″ Moisture-Resistant Construction 67mm Front Filter Size Focal Length 20 to 40mm Maximum Aperture f/2.8 Minimum Aperture Not Specified by … Continue reading Tamron 20-40mm f/2.8 Di III VXD lens specifications