50mm for a good price / quality ratio

Obviously less powerful than its big brothers to see excessive high prices, this entry-level objective has still not bad qualities. It's very light, which is not negligible, and its sharpness is pretty good.
What we obviously appreciate is its openness. (Maximum 1.8)
With it, you can achieve beautiful portraits, bright and detailed.
Its major flaw is perhaps the slow autofocus, which sometimes proves difficult enough.
Finally, the Sony 50mm is not so expensive, and it would still be stupid to miss!
At advisor to advanced amateur photographers.