Agree with the other reviewer RE crops. I'm using this on a trip and with a 7D @ 18MP I get fantastic 100% crops. This is a great landscape lens and I think a great buy if you can deal with primes.

Sharpness; fast AF; color; contrast

None

awesome lense.

I played around with wide and ultra-wide lenses over the years. The best lens for a full frame camera that I have found is this 20mm lens. It seems to be wide without exhibiting extreme distortion. The nice part if the field curvature works well taking photos of small rooms.

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 played around with wide and ultra-wide lenses over the years. The best lens for a full frame camera that I have found is this 20mm lens. It seems to be wide without exhibiting extreme distortion. The nice part if the field curvature works well taking photos of small rooms.

If you were actively seeking a review of this lens, the chances are that you've already seen another one written by Mr Ken Rockwell, who I believe it's fair to say divides opinion on many photography matters.

Fast and accurate focus; sharp frame centre; attractive colour rendering

Soft corners; field curvature; colour fringing

Utilisant le plein format plein depuis peu , avec un 6D je viens de compléter mon zoom EF 24-70 mm f :4 IS avec ce 20 mm f: 2.8 dont la définition et le piqué sont excellents dès 2.8 et l'on peu travailler avec l' hyperfocale très utile avec cet optique

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

The optical construction is made of 11 elements in 9 groups without any special glass. The aperture mechanism features 5 blades. With a min. focus distance of 0.25m the max. object magnification is about 1:7. The lens feature a floating system for close focus correction.

The focal length of this prime lens from Canon is on the edge of ultra wide angle when used on a full frame sensor or the 35mm film it was originally designed for. Even on a cropped sensor, it provides a good angle of coverage. We take a look at how it performs.

Good build and finish; Nice focal length on Full Frame cameras; Silent and fast autofocus; Good image quality

Not that useful on cropped sensors; Stiff manual focus ring (on example tested; Distortion worse than on modern designs (minor point; Hood not included with lens