Good morning dear photo friends! I bought this lens yesterday, the Canon EF 50mm f1.4 USM. I previously owned the f1.8 version of Canon's 50mm siblings and was actually very happy with it. Since I like to be hired as a photographer at family celebrations (my work is appreciated), it was only a matter of time (and money *grin*) before I would buy you a higher-quality version. Reasons for the change: - USM ensures better focusing in low light >>>> the f1.8 was happy to pump back and forth for a few seconds, snapshots were not possible - 8 instead of 5 aperture blades >>>> a lot nicer bokeh, after all I don't always want to have to take pictures with an open aperture so that the "balls" are round - haptic >>>> it's still plastic, but it feels much better! - constant intervention in the focusing possible >>>> the f1.8 could easily have been killed with it :S and if someone else had the camera in their hands *oh oh* - light intensity >>>> rather a nice-to- have I found the bokeh and USM autofocus to be the most important and both work perfectly and make me happy. :) Clear purchase recommendation!