Now as to the first 200 images made Hab ca with it and am excited as a hobby photographer.
That which is true here is the auto focus - it detects dark areas not because you should already accurately target or look for a brighter spot.
The engine of the car Fokuses sounds hard. But you can for just under 100 euros and no motor expect objectively like a 400 Euro.
Conclusion
The lens is located and make sharp and beautiful pictures.
Absolute buy recommendation.
4 stars is because the autofocus does not work 100% put in darker.