Great news for Cannon users who like prime lenses. I love my Pentax 40 and 21 primes.
Canon’s New EF 40mm f/2.8 Pancake Lens Doesn’t Waffle on Quality
Canon’s newly announced EF 40mm f/2.8 Pancake Lens has a focal length that places it squarely in that bland category known as “Normal.” Even used with an APS-C size sensor, it lands on the outskirts of “Normal,” with a view equivalent to 64mm in full-frame format. Several highly prized features help the EF 40mm lens rise above the crowd,
If the build quality of these lens is anywhere close to the Pentax model you are going be delighted though you may want to wait for a 21mm model if your Cannon has an APS-C sensor