Summary: This prime lens is fantastic. It's faster than the 30mm pancake lens, just as sharp, the shallow depth of field is amazing, takes fantastic portrait shots, and has a handy AF/MF switch so you don't have to play around in the menus. Works well in low light compared to the 30mm.
Summary: Really good lens for portrait photos, I use it almost everyday to take pictures of my little baby with great results, thanks to its aperture, it works really nice on low light environments, and when having good light the results are amazing.
Summary: Tack sharp and quick to focus. This small lens is excellent at everything but extremely close focus. When this lens is used near it's minimum focus distance, the images become quite soft. Back up a few feet and things get sharp again. This is not a good lens for "macro" work.
Summary: This is a great fast lens for the Samsung NX cameras. It is a full frame equivalent of 67mm f2.7 (on a apsc size crop sensor camera you get the 35mm equivalent by 1.5) it allows you to blur the background for portraits and shoot in low light without flash. It is also very sharp. Great lens.