Richard CanonNews / Monday, February 19, 2018 / Categories: Reviews, Third Party Reviews Is 40mm the best focal length? Kai thinks so.. In another video, Kai goes through the the diminutive 40mm pancake lens by Canon. A lens that is super cheap and super good. It should really be part of any Canon kit. The 40mm at a glance; EF-Mount Lens/Full-Frame Format Aperture Range: f/2.8 to f/22 One Aspherical Element Super Spectra Coating STM Stepping Motor for Smooth, Silent AF Rounded 7-Blade Diaphragm Previous Article The battle of the Canon 85mm's Next Article Popular Science: Article on Canon's broadcast camera lenses Print 4289 Leave a comment Name: Please enter a name. Email: Please enter an email address. Please enter a valid email address. Comment: Please enter comment. I agree This form collects your name, email, IP address and content so that we can keep track of the comments placed on the website. For more info check our Privacy Policy and Terms Of Use where you will get more info on where, how and why we store your data. You must read and accept this rules. Add comment