The Canon EF 40mm f/2.8 STM ($199.99 direct) lens is one of the smallest you'll find for Canon cameras . Its pancake design barely juts out from a camera when mounted. It can be used on full-frame and APS-C D-SLRs, and provides smooth autofocus for video recording when paired with the EOS Rebel T4i...
Extremely compact; Very sharp; Minimal distortion; Inexpensive; STM focus motor
Focus-by-wire design; Modest f/2.8 aperture