Just messing around, cold and wet outside an boring inside. The 850 really shines up to 3200 and falls off.
Sony a77 1600iso
Sony a850 1600iso
Sony a77 3200iso
Sony a850 3200
Sony a77 6400 iso
Sony a850 6400iso
EDIT one more. this is the NEX 7 and the Carl Ziess 24mm at 6400. pretty impressive if you ask me.