Review Canon EF 40mm f/2.8 STM. Extremely compact and portable design
Never be without your EOS. Smooth and quiet AF, STM focussing for movies
Fast, accurate autofocusing ensures pin-sharp images even in tough conditions. Movie Servo AF with STM uses stepping-motor technology for smooth, quiet autofocus when filming on compatible Canon DSLRs.
A fast maximum aperture allows hand-held shooting in low light without using flash.
Great image quality designed for travel versatility
A versatile 40mm focal length is great for travel. Tackle everything from portraits to landscape and street photography. Great image quality right across the frame, thanks to an aspherical lens design and Super Spectra coatings. 
Product Highlights:
* STM - Continuous Autofocus for Shooting Video
* Bright f/2.8 Aperture
* Lightweight 4.6 oz Lens
* Unobtrusive--Less Than 1" Long
* Aspherical Element--High Image Quality
* Optimized Coatings Reduce Ghost & Flare
* Exceptional Color Balance
* 7-Blade Diaphragm for Beautiful Bokeh
* Close Focusing to 11.81"
* 64mm Equivalent If Used on APS-C Camera
Review Canon EF 40mm f/2.8 STM | Lens
