Picture perfect, but feel mediocre

Once I thought of having to spend a lot of money for a 1.4 sigma to get perfect pictures, I bought this lens for my Sony A77. I screwed it on it and was thrilled!
Such perfect pictures I did not expect for this price and quite simple mechanics. Autofocus is fast and precise. The engine is not a ultrasonic motor which you can hear him work well. However, it is compensated by the resulting images for all.

Conclusion: I will never give it ago. Quite the Gege Neil, I bought the 30mm this series also the same, with the same experience.