LensTip.com

Lens review

Canon EF 50 mm f/1.4 USM

15 December 2009
Arkadiusz Olech

10. Autofocus



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

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

It is obvious that there’s an USM motor inside. The focusing is quite fast, pretty silent and its accuracy level is acceptable. The number of misses for the studio charts didn’t exceed 9% - not bad for the 20D body. Apart from that, the sharpness in most of the cases was set in the right place so neither before nor after the given subject. The picture below shows it quite well.

Canon EF 50 mm f/1.4 USM - Autofocus

Only the 1Ds MkIII showed us what a significance of a good body in this category is. When testing a lens I always take about 5-8 shots at every aperture using the autofocus and then additionally I take several to over a dozen pictures focusing manually; it allows to present and assess the real lens’s performance on the graph, omitting any autofocus errors. Here, at the maximum relative aperture all the pictures, taken with the autofocus on, were more or less better than those, taken with manual focusing. Overall, after considering all photos taken with the help of the 1Ds MkIII on all testing charts, the number of misses didn’t exceed a negligible level of 2%.