Seriously...this lens is absolutely AMAZING! I own/have owned a lot of nice lenses, but this lens makes me happy every time I use it. It's so sharp/contrasty, it's light and small (I've never been much for primes, because I don't like to carry a lot of gear/be limited, but now I can toss the 135L on the camera for most of my shots, and keep the 40 2.8 in my pocket just in case I need something wider and hit the town.
Here's the latest one that made me happy...5D2 + 40 2.8 STM - ISO 100, f4, 1/200 sec...shooting in Busan, South Korea:
100% crop, ZERO sharpening (just a bit of highlights/shadows, touch of contrast, but 99% SOOC):
IMAGE LINK: http://www.flickr.com …/56150019@N07/8328281024/
EDITIMG_7618-100crop by canonzenit, on Flickr
That is all...bang for buck, this lens is, I think, the best value Canon has right now...try one today!! haha