Why this stupid introductory sentence?
Anyone who thinks he can replace his 50mm prime lens by Sigma and on top of that a 1: 1 macro gets I have to disappoint you, unfortunately.
Perhaps they have indeed the EF 50mm 1.4 or plastic Fantastik 1.8 50mm and playing with the idea to replace them with the Sigma and on top of that to get a great macro ... Forget Order funny.
The Sigma is a great Nahobjektiv and plays in this field its strengths.
As a portrait lens or light giant it's actually useless.
1 star deduction for the unspeakably lame AF. So please in macro old fashion manual focus, otherwise the one-day fly has died of old age before the lens from focusing.