In March, PetaPixel reported that Canon intends to release seven or eight RF lenses per year, which is a pretty aggressive release schedule, helping Canon catch up to the more than 70 EF lenses that were available when the EOS R system launched in 2018. A pair of EF lenses that have yet to make their way to the RF system are Canon’s EF 200mm f/1.8L USM and EF 200mm f/2L IS USM fast primes.
According to Canon Rumors, that might be changing soon, as Canon has patented an optical formula for an RF 200mm f/2 lens.
The patent describes a lens with a 195mm focal length, f/2.05 aperture, and a full-frame image height. In included representative drawings, the lens includes an image stabilization lens group sandwiched by a pair of focusing groups, although another graphic shows a slightly different optical arrangement.
A commenter on Canon Rumors, SwissFrank, suggests that patents such as this new one are for “recipes for lenses,” rather than for specific, precise lens designs, which would help explain how there are different optical arrangements in a couple diagrams.
That said, another commenter, neuroanatomist, points out that Canon’s patent application for a 24mm f/1.8 lens looks the same as the eventual RF 24mm f/1.8 Macro IS STM lens’ optical design.
In any case, Canon has patented a 200mm f/2 lens and it is reasonable to expect that, at some point, Canon will release an RF 200mm f/2 lens with optical image stabilization.
“I don’t understand the point of a new RF version of this lens when it’s already well covered with the EF version. Sure, it’ll have the latest Image Stabilizer and control ring. But it’s still an f/2 like the current EF version,” writes GMCPhotographics on Canon Rumors. “Size and