I've had this lens for several years. The images are soft at all apertures. There's a color cast. There's massive vignetting, though PIC removes it pretty well.
You'd be better served to save your money for the 17-40 zoom.
January 22, 2013
Not the best
Images have a purple cast and are a little soft at all apertures. Save your money until you can buy the 17-40 instead, you'll get sharper images.
January 2, 2013
A great lens!
I've had the EF 20mm/2.8 for about four years. Can't be happier with it, except maybe I'd like a smaller, lighter version. You just can't have it all.
The performance is very good. Edge sharpness, on film or digital full frame, shows some softness wide open, but it crisps up very well by f/4.0. Focusing is fast and exact.
I keep a filter on mine always, no signs of additional vignetting caused by the addition of a full thickness filter. The front does not rotate - polarization filters are not a hassle. Corner darkening does exist, but also cleans up in the middle apertures.
I like this lens, I shoot with it quite a bit. More than the medium length lenses, I tend to shoot wide mostly. I currently use two EF 28mm lenses (2.8 and 1.8), a EF 24mm-105mmL, and this EF 20mm/2.8 for my wide angle lenses. For bodies I've got an A2e and Rebel-Xs for film, and a 5d-mk ii and Rebel XTi for digital. I am an avid amateur, but do shoot the occasional wedding and products commercially.
Wish all the Canon lenses came with their respective hoods!
June 13, 2012
Panned by the press, So what?
Have had this lens since the mid 1990's when the street price was high. Yes there is corner falloff and vignetting in a 5D MKll, so what shoot around those limitations and you have one fine lens. Stacking filters is not a good idea. I get tack sharp results very fast autofocus, great low light performance and you can stick it in someones face and get a nice shot that isn't so exagerated that it looks comic book. Takes great close ups with great depth of field. I recommend that anyone who has difficulty first try the autofocus lens compensation on the 5DMKll and see if that helps. I have used this on three other APS Canons also several film EOS's(remember film) with equally nice results You also may want to use the 10-22 ES for even better results..
February 9, 2012