All hail the mighty G Master! All hail the mighty G Master!
http://www.dxomark.com/Lenses/Sony/Sony-FE-24-70mm-F28-GM-WEB
Oh wait ... on the 36mp A7R the G Master is almost as sharp as the Canon 24-70/2.8 on a 22mp 5DIII? Hmmm. And with the Canon lens on a 50mp 5DSR, it's not even close: 17 P-Mpix for sharpness vs. 32 P-Mpix for sharpness.
And the Canon zoom is cheaper, and smaller, and 80 grams lighter, and is not focus by wire.
http://www.dxomark.com/Lenses/Sony/Sony-FE-24-70mm-F28-GM-WEB
Oh wait ... on the 36mp A7R the G Master is almost as sharp as the Canon 24-70/2.8 on a 22mp 5DIII? Hmmm. And with the Canon lens on a 50mp 5DSR, it's not even close: 17 P-Mpix for sharpness vs. 32 P-Mpix for sharpness.
And the Canon zoom is cheaper, and smaller, and 80 grams lighter, and is not focus by wire.