07-21-2016, 10:36 AM
(This post was last modified: 07-21-2016, 10:37 AM by Brightcolours.)
The difference in AF is in the communication and algorithms used, the steps the lens takes. How the AF is implemented motor/gear wide in the lens is not that important.
Canon DSLRs like the 70/80D can focus pretty well with USM lenses in live view, and they can focus just fine with STM lenses in PD AF.
The AF implementation in a lens does not have a big impact on price.
Canon DSLRs like the 70/80D can focus pretty well with USM lenses in live view, and they can focus just fine with STM lenses in PD AF.
The AF implementation in a lens does not have a big impact on price.