This week in a special edition of the Imaging Resource Podcast, Mark Weir, the Senior Technology Manager at Sony, joins us for a discussion about their pair of newly-announced wide-angle lenses: the 16-35mm f/2.8 G-Master and the 12-24mm f/4 G. Mark talks about what makes these lenses unique, like the special technology that both employ to deliver what they consider to be the best autofocus in their respective classes, and their impressive true corner-to-corner sharpness.