Summary: I'm not jumping on the bandwagon with this lens because its a Zeiss. I have used this lens a couple of times with mixed results. I had taken this lens out one day and popped it on my A77 for a Parade local in my area. I would say about just less then half my shots were good and usable. The day was overcast but i was still able to attain fast shutter speeds and low ISO using a 2.0 or 2.5 aperture for the day.