IQ of Zeiss 24-70/2.8 on A57
I once used the 24-70z on an a350 (replaced my first lens the 16-80z). It was an awesome combo back in those days -- ultra fast focusing, beautiful colors and contrast... and it's a joy to use the 24-70z. It probably will work just great on your a57 today. However please note the missing 16-23 mm range when you use this 24-70z (if you need ultra wide angle when trapped in tight places). Otherwise, go for it!!