I finally managed to get up into the mountains for some extreme alpine backpacking on Mt Rainier and Mt Hood over the last few weekends. This provided me the opportunity to test out the 11-22 IS lens. I brought the 18-55 IS but only used it once. I have been blown away by the 11-22's quality. The corners are amazingly sharp! It easily beats the image quality of my 16-35/2.8L II when mounted to my 5D2. When DxO Mark released their review of the 11-22 I have been running comparisons to see how it measures up to the competition. I have been surprised to find that it wins out time and time again. I recorded my comparisons and thought the EOS-M community might find the comparison useful.
Canon EF-M 11-22 IS compared to the competition
-Overall: nothing comes close to delivering this level of wide angle image quality when considering the cost, size and weight, plus the lens includes image stabilization and has excellent flare control
-Price ($400): significantly less expensive, only the Sony 16-50 general zoom is less and it isn't remotely competitive by any other criteria
-Size (2.4x2.6): smaller to much smaller, except for slightly heavier than Olympus 9-18
-Weight (220g): lighter to much lighter, equal to Sony 10-18 and slightly heavier than Olympus 9-18
-Sharpness: easily beats nine lenses and matches Olympus 9-18, with Sigma 18-35/1.8 and Nikon 14-24/2.8 offering noticeable improvement
-CA: beats all lenses while matching Sigma 18-35/1.8 and Canon 17-55/2.8 IS
-Distortion: beats six and matches four, with Sigma 8-16 and Canon 10-22 offering noticeable improvement
-Vignetting: beating three and only slightly worse/equal to eight, with only the Sigma 18-35/1.8 offering noticeable improvement, making this the weakest aspect of the lens
Canon EF-M 11-22 IS @ 11mm f/8
vs
Olympus ED 9-18 @ 9mm f/5.6
-Price ($700): much more expensive
-Size (2.2x1.9): smaller
-Weight (155g): lighter
-Sharpness: equal
-CA: worse
-Distortion: horrifically bad
-Vignetting: slightly better
Canon EF-M 11-22 IS @ 11mm f/8
vs
Panasonic G 7-14 @ 10mm f/5.6
-Price ($970): much more expensive
-Size (2.8x3.3): much larger
-Weight (300g) heavier
-Sharpness: worse in corners
-CA: much worse overall
-Distortion: horrifically bad
-Vignetting: slightly better
Canon EF-M 11-22 IS @ 11mm f/8
vs
Sony E 10-18 @ 10mm f/8
-Price ($850): much more expensive
-Size (2.8x2.5): slightly larger
-Weight (225g): equal
-Sharpness: worse in corners
-CA: slightly worse overall
-Distortion: slightly better
-Vignetting: horrifically bad
Canon EF-M 11-22 IS @ 11mm f/8
vs
Sigma 8-16 @ 10mm f/8
-Price ($850): much more expensive
-Size (3.0x4.2): much larger
-Weight (555g): much heavier
-Sharpness: much worse in corners and overall
-CA: worse overall and much worse in corners
-Distortion: better
-Vignetting: slightly better
Canon EF-M 11-22 IS @ 11mm f/8
vs
Sigma 10-20 @ 10mm f/8
-Price ($650): much more expensive
-Size (3.4x3.5): much larger
-Weight (520g): much heavier
-Sharpness: much worse in corners and overall
-CA: worse in corners
-Distortion: slightly better
-Vignetting: slightly better
Canon EF-M 11-22 IS @ 11mm f/8
vs
Canon EF-S 10-22 @ 10mm f/8
-Price ($650): much more expensive
-Size (3.3x3.5): much larger
-Weight (386g): heavier
-Sharpness: much worse in corners
-CA: worse in corners
-Distortion: much better
-Vignetting: slightly better
Canon EF-M 11-22 IS @ 11mm f/8
vs
Nikon 14-24/2.8G @ 16mm f/8
-Price ($2,000): insanely expensive
-Size (3.8x5.2): insanely large
-Weight (969g): insanely heavy
-Sharpness: much better overall
-CA: slightly worse in corners
-Distortion: equal
-Vignetting: equal
Canon EF-M 11-22 IS @ 11mm f/8
vs
Canon EF 16-35/2.8L II @ 16mm f/8
-Price ($1,700): insanely expensive
-Size (3.5x4.4): much larger
-Weight (635g): much heavier
-Sharpness: much worse in corners
-CA: much worse in corners
-Distortion: slightly better
-Vignetting: worse
Canon EF-M 11-22 IS @ 17mm f/8
vs
Sony E 16-50 @ 16mm f/8
-Price ($350): slightly less
-Size (2.5x1.2): smaller
-Weight (116g): lighter
-Sharpness: much worse in corners
-CA: worse in corners
-Distortion: horrifically bad
-Vignetting: much worse
Canon EF-M 11-22 IS @ 17mm f/8
vs
Canon EF-S 15-85 IS @ 15mm f/8
-Price ($700): much more expensive
-Size (3.2x3.4): much larger
-Weight (575g): much heavier
-Sharpness: worse in corners
-CA: worse in corners
-Distortion: worse
-Vignetting: equal
Canon EF-M 11-22 IS @ 17mm f/8
vs
Canon 17-55/2.8 IS @ 17mm f/8
-Price ($880): much more expensive
-Size (3.3x4.4): much larger
-Weight (635g): much heavier
-Sharpness: slightly worse in corners
-CA: equal
-Distortion: slightly worse
-Vignetting: equal
Canon EF-M 11-22 IS @ 17mm f/8
vs
Sigma 18-35/1.8 @ 18mm f/8
-Price ($800): much more expensive
-Size (3.1 x 4.8): much larger
-Weight (811g): insanely heavy
-Sharpness: better in corners
-CA: slightly better in center but slightly worse in corners
-Distortion: worse
-Vignetting: better