LensTip.com

Lens review

Canon EF-S 10-22 mm f/3.5-4.5 USM

23 September 2007
Arkadiusz Olech

7. Coma and astigmatism



Please Support Us

The coronavirus crisis has been adversely affecting many businesses and, sad but true, ours is not an exception. Despite that difficult situation we would like to preserve continuity and high quality of publications available on all our websites. Still, we are now aware it might be impossible without additional financial help. That's why we would like to ask all those who visit, read, and care about Optyczne.pl, LensTip.com i Allbinos.com for support - it's enough you send us a small sum of money via PayPal. If a lot people decide to support our websites we think we'll stand a chance and survive next months without any lasting harm. We count on your support and understanding, stay safe and be healthy.

- - - - - - - - - - - - - - - - - advertisement - - - - - - - - - - - - - - - - -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

In wide angle lenses it is hard to control coma on the edges of the field of view and the Canon 10-22 mm is not an exception. Coma can be noticed for every focal length and the biggest one is for 10 mm.

Canon EF-S 10-22 mm f/3.5-4.5 USM - Coma and astigmatism


Another off axis failure - astigmatism - is controlled even better than the coma. The average difference between the parallel and horizontal MTF50 values is 7%, which makes the results quite good. However, there are significant differences between the individual focal lengths. For a 17-22 mm range, the astigmatism is traceable and reaches 3-4%, but as we expected, the astigmatism is becoming visible for a maximum wide angle and reaches as much as 15%.