Quick test of Canon 10-22mm f/3.5-f/4.5 USM
All pictures are taken in RAW at 10mm ISO100 with a tripod within one minute. The only thing that was changed was the aperture. A small section of all the pictures have been cut out for comparison (marked in red):
| Av | Image Section | Av | Image Section | |
| f/3.5
|
 Help! This is awful!!! Don't ever shoot with f/3.5!!!! |
f/4.5 |
 Okay now things are starting to look good! |
|
| f/5.6 |
 |
f/7.1 |
 |
|
| f/8 |
 Hmm, it is starting to go the other way again, but still acceptable |
f/10 |
 |
|
| f/13 |
 |
f/22 |
 Not usable again! |