Canon EF 20mm f/2.8 USM - Review / Lab Test Report - Sample Images & Verdict
Lens Reviews - Canon EOS (APS-C)

Sample Images

All sample images kindly provided by Jerry Kooyman. Click on a thumbnail to view the original file (opens in a separate window). Please note that the originals are FULL SIZE samples (=several megabytes) thus requiring a significant amount of bandwidth so please take care of the limited resources here.

Make Canon
Model Canon EOS 30D
ISO Speed 400
Focal Length 20.0mm
Exposure Data: f/7.1 @ 1/1600s
Size 3504x2336
Make Canon
Model Canon EOS 30D
ISO Speed 400
Focal Length 20.0mm
Exposure Data: f/8.0 @ 1/250s
Size 3504x2336
Make Canon
Model Canon EOS 30D
ISO Speed 400
Focal Length 20.0mm
Exposure Data: f/2.8 @ 1/6400s
Size 3504x2336
Make Canon
Model Canon EOS 30D
ISO Speed 400
Focal Length 20.0mm
Exposure Data: f/8.0 @ 1/800s
Size 3504x2336

Verdict

Since the release of the EOS system we have seen several updates to Canon ultra-wide zoom lenses but they didn't really care about their fix-focals in this range ever since their initial release back in the early 90s. The Canon EF 20mm f/2.8 USM feels a little dated by now - less so regarding its mechanical qualities but optically it isn't really something special anymore. Most good quality zooms can match its quality by now. The fix focal lens can still convince regarding distortions and CAs. Resolution-wise it is still a good to very good lens for sure - just not more than that. Vignetting is a little on the high side at f/2.8 which is a little disappointing for a full format lens tested on an APS-C DSLR. So unless you require an affordable, large aperture lens in this range there're few reasons left to favor this lens over e.g. the Canon EF 17-40mm f/4 USM L.

Optical Quality:    
Mechanical Quality:
Price/Performance:
      
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