When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The Canon EF 200 f/1.8L USM and EF 200mm f/2L IS USM are classic lenses, and it looks like Canon has plans for an RF version. While this focal length and speed are a niche combination, anyone that … Continue reading Canon has patented an optical formula for an RF 200mm f/2L IS USM