LensTip.com

Lens review

Canon EF-S 18-135 mm f/3.5-5.6 IS STM

21 September 2015
Arkadiusz Olech

10. Autofocus



Please Support Us

If you enjoy our reviews and articles, and you want us to continue our work please, support our website by donating through PayPal. The funds are going to be used for paying our editorial team, renting servers, and equipping our testing studio; only that way we will be able to continue providing you interesting content for free.

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

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

The tested lens boasts an STM autofocus motor so its work during the focusing is completely noiseless. Still it can hardly be called a speed demon because running through the whole distance scale and confirmation of the focus takes about 0.8-0.9 of a second. We’ve seen much faster mechanisms based on the same technology.

Still you shouldn’t carp about the accuracy. The lens misfocuses sporadically and such cases never exceed 2% of the whole number of photos. The lens didn’t need to be micro-calibrated with front or back focus in mind either.

50D, 85 mm, f/5.6
Canon EF-S 18-135 mm f/3.5-5.6 IS STM - Autofocus
50D, 135 mm, f/5.6
Canon EF-S 18-135 mm f/3.5-5.6 IS STM - Autofocus