Excerpt: Because of it's size I think this is going to be a good lens to take hiking and creating panos. Don't much care for the focus ring and find this lens to work easiest on a tripod when you have time to focus, not sure I would say this is good for catching fast moments.
Pros: Compact Size, Lightweight, Popular Filter Size
Cons: No IS, No lens hood, Thin focus ring, Tough To Manually Focus
Excerpt: Bought this lense for street photography with my T2i. Together they make a nice small pair.The stm AF motor is not silent, but I really am not disturbed by AF noise. I prefer that it does make some audible sound to confirm that its doing its job.The viewing angle is kind of interesting.
Excerpt: That's probably due to my over-expectations. I compared this lens side-by-side with my EOS T3i kit lens (18-55, F/3.5-5.6) and discovered that my new EF 40mm f/2.8 STM gives LESS resolution than the kit lens.
Excerpt: I recently picked up this lens. For the price I couldn't resist. I've yet to use this lens on a regular basis, so the jury is still out. Autofocus is not as quick as with a USM lens, as to be expected, but this reminds me a little of the Canon 50mm 1.8 lens.
Excerpt: So first, I always rate relative to the price point, market segment etc. of the product. In other words, I'm not going to give a T3i two stars because it doesn't shoot 12 FPS or have 'x'D series camera body features...
Pros: Easily Interchangeable, Lightweight, Strong Construction
Cons: Inconsistent Exposure, Not An Outdoor Lens, Slow Focus
Conclusion: The lens, for the money, is pretty good. However....the contrast is weak and it seems to have some distortion. A 40mm really souldn't have much, if any, distortion. The latter is easy to fix in Lightroom, or DxO, but the contrast is difficult to remedy.
Excerpt: I expected more from this lens based on reviews I read. I used the lens mainly for street shots in NYC and Madrid. I missed a 35mm focal lenght that gives a distinct perspective in a FF body. Better than 40mm. The best thing is their weight. It's as if I was carrying only the camera 5D II body.