Sigma Japan (Click here) announced that many of the current Sigma lenses are having autofocus issues with the new A77 and A65 cameras. A bit below you can read a list of the affected lenses. Sigma will offer a free service to fix the lenses. All future Sigma packages will have the logo on top whenever the lenses ahas been already made compatible with the A77 and A65 cameras.
These are the non compatible lenses:
2,8/4,5 mm EX DC CIRCULAR FISHEYE HSM
2,8/10 mm EX DC FISHEYE HSM
3,5/10-20 mm EX DC HSM
2,8/17-50 mm EX DC OS HSM
2,8-4/17-70 mm DC MACRO HSM
2,8-4/17-70 mm DC MACRO OS HSM
2,8-4,5/18-50 mm DC OS HSM
3,8-5,6/18-125 mm DC HSM
3,5-6,3/18-250 mm DC OS HSM
2,8/24-70 mm IF EX DG HSM
1,4/50 mm EX DG HSM
4-5,6/50-200 mm DC HSM
APO 4,5-6,3/50-500 mm DG OS HSM
APO 2,8/70-200 mm EX DG OS HSM
1,5/85 mm EX DG HSM
APO 4,5-5,6/120-400 mm DG OS HSM
APO 5-6,3/150-500 mm DG OS HSM