Cracking the Canon code: what letters like VCM, RF-S and DO tell you about your lens

Image: Canon As with other brands, Canon's lenses feature many letters and acronyms in the lens names. Seeing something like Canon RF 24-105mm F4L IS USM can leave you scratching your head if you don't know what each of those things means. Each acronym refers to something useful, though, so understanding how to decipher Canon lens names can help you quickly grasp what the lens offers without digging into specs. In this article, we'll be breaking down Canon's common lens terminolo...