Canon May Be Building a 300mm That Turns Into a 400mm

Canon cameras and lenses have been at the forefront of technological innovations in the industry. With the launch of the mirrorless cameras, the company has been reinventing its lineup, especially its lenses. Per new reports, Canon has worked on multiple patents, including the likes of 35mm f1.2L, which has high hopes from users. It now appears that Canon intends not only to broaden the horizon of wide-angle lenses but also super-telephotos, the latter of which can truly be of use to many photog...