USM and IS are two different things, but they are both used in camera lenses. USM is the acronym for Ultrasonic Motor. USM works by moving the lens element inside a camera so as to appropriately...Read More
Both A.C and D.C. motors have similar functions. Both of them work by converting electric energy into mechanical energy. However, A.C. and D.C. motor are powered and controlled differently. A.C....Read More
Brushed Motors make use of a motor coil, which acts as the rotor that will be connected to a commutator, and a pair of permanent magnets which function as the stator. The major source of power...Read More
