I shoot with it on a Canon 40D. I bought this lens for shooting nightclubs and bands, in locations I did not want to risk taking my 24-105L lens. I intended this to be a cheap purchase that I could use at F4 to F5.6 combined with a bracket mounted flash to shoot clubs and events.

fast focusing even in low light; wide; great colors

I occasionally really miss shots because of focus being off

In the era of APS-C sensors a 20 mm instrument became an equivalent of a classic 35 mm lens. On the one hand a shorter focal length might suggest more problems with the image quality at the frame edge, especially when it comes to distortion and vignetting.

solid casing; excellent resolution in the frame centre; very well corrected astigmatism; decently controlled coma; silent; quick and accurate autofocus

average image quality at the frame edge; a bit too high chromatic aberration; huge vignetting even on an APS-C sensor; weak work against bright light

I'm very happy with my new camera. The deal was great and I received it in the mail the next day.

This lens is a bit like the quiet kid who gets good marks in the classroom. He doesn't win any popularity contests, is the last to get picked for sports teams and most of the other kids don't know his name, but the report card speaks for itself- all A's.

Super-sharp images; Fast auto-focus

The Canon 20mm f/2.8 USM lens often catches a bad rap for being soft in the corners, having horrendous vignetting wide open, and being plagued with an overall lack of contrast. I'm here to tell you why absolutely none of that matters.

I bought this lens with some skepticism because of some bad reviews. The truth is that I found this lens to be an exceptionally high quality lens, with great IQ and well built. It has become my walk around lens, I have learned to appreciate the wide view provided by this focal length.

The Canon EF 20mm f/2.8 USM ($539.99 direct) is a fairly compact wide-angle lens for Canon D-SLR cameras. When used on a full-frame body, the lens can capture stunning landscapes, and its distortion characteristics are controlled enough for use for architecture. Mounting it to an APS-C camera like the EOS Rebel T4i gives the lens a narrower 32mm field of view, which is still considered to be a moderate wide angle. When you consider its field of view, the lens is pretty compact. It measures just 2.8 by 3.1 inches (HD) and adds 14.3 ounces of weight to your gear bag. It can focus as close as 0.8-foot, which allows you to get some interesting shots with a shallow depth of field, but when shooting wider scenes the lens will keep everything in focus, as racking it to infinity will put every object more than three feet from the lens in sharp focus. The front element is slightly curved, but you can still use a screw-in filter with the lens—you'll just have to invest in one with a rather...

The Canon EF 20mm f/2.8 USM lens delivers an ultra-wide field of view on full-frame cameras, and is quite sharp once you stop down to f/4.

Ultra-wide field of view; Sharp when stopped down; Minimal distortion

Slightly soft at f/2.8; Prone to color fringing

The Canon EF 20mm f/2.8 USM ($539.99 direct) is a fairly compact wide-angle lens for Canon D-SLR cameras . When used on a full-frame body, the lens can capture stunning landscapes, and its distortion characteristics are controlled enough for use for architecture.

Slightly soft at f/2.8; Prone to color fringing

The Canon EF 20mm f/2.8 USM ($539.99 direct) is a fairly compact wide-angle lens for Canon D-SLR cameras. When used on a full-frame body, the lens can capture stunning landscapes, and its distortion characteristics are controlled enough for use for architecture.

I brought it for group shots at weddings as it was recommended to me

Easily Interchangeable; Lightweight