Canon has been working enthusiastically on the EOS M series APS-C mirrorless cameras for quite some time. These cameras have the advantage of having the largest sensors in the ‘truly compact’ mirrorless cameras. The 22mm f/2.0 STM ‘pancake’ lens takes pride in fast and quiet autofocus enabled by the stepper motor.
Design and Build Quality
The 22mm f/2 STM is an ultra-slim and lightweight ‘pancake’ lens, constructed with a combination of metal and engineering plastic. The lens feels sturdy with both the mount and the focus ring made of metal. It accepts a 43mm filter.
The EF-M 22mm f/2 lens provides an full frame-equivalent focal length of 35mm. The lens has an aperture range of f/2 to 22. The lens has inner focussing, which achieves focus by moving groups of elements inside the lens. It uses a stepper motor (STM) to drive the AF mechanism. STM provides smooth and near-silent continuous autofocus when shooting video so that the operating sound does not spoil your video clips.