Excerpt: I bought this to pair with a Canon SL1 body for a light weight travel package. I have taken this lens out a few times and am getting very usable images. I find them slightly better than the 25mm pancake. I also find the quality slightly better than my nifty fifty. The more I shoot with it, the more I like it. Well worth the price. It is an STM so I am also using it for video. Quality seems pretty good, but DSLR video takes some practice.
Pros: Consistent Output, Fast / accurate auto-focus, Lightweight, Nice Bokeh
Excerpt: I bought this lens to have a compact short lens that will fit in my pocket for events that I am mostly shooting with a long lens but may want to grab a short lens for occasional use. It is also nice when I want to travl with something small and light, or to be inconspicuous while shooting. The lens is small, but it it also very sharp. Build quality is good. Hard to go wrong for the price.
Pros: Easily Interchangeable, Fast / accurate auto-focus, Lightweight
Excerpt: I am quite impressed with the quality of this lens, both opticaly and build. I use this lens a a general walk around lens and is very usefull for this. The only thing I don't like about this lens is the manual focus operation. Since it's focus by wire you have to half press the shutter button and then you can turn the focus ring to change focus. If there's no movement of the focus ring for 5 seconds you have to half press the shutter button again to continue focusing.
Summary: I have used this lens on my full frame 6D and crop 60D cameras and am impressed I that I spent so little money for such a great performer. It is small and the focus is slow-ish but it gets great results!
Excerpt: I struggled with my decision on whether or not to purchase this lens or the cheap nifty fifty and I'm happy with my purchase in the end. The STM motor is a little bit different than what I'm used to but after getting use to it it's quite smooth and silent. I really enjoy the 40mm aspect ratio on my 5D Mark III because of the ability to crop in anyway. The only downside I'm seeing is that you can't go past f2.8.
Pros: Durable, Easily Interchangeable, Lightweight, Nice Bokeh, Strong Construction