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Are all SAL lenses scre driven?

edwardkaraa

New member
Screw driven lenses are not inferior to SSM. The long focus throw makes them better for MF. On the A900, I can't see any difference in AF speed with SSM.
 

Braeside

New member
SSM is quieter and uses perhaps slightly finer AF microsteps, but it adds quite a bit to the battery consumption of the camera. SSM is not always faster than screw driven, my 80-200HS-G screwdriven zoom is much faster than the 70-200 SSM for example.
 
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