When Canon released the EOS R in October of 2018, they also released three adapters, to allow photographers and videographers to use their existing EF and EF-S mount lenses on the new mirrorless system.
The Control Ring Mount Adapter EF-EOS R is perhaps the most interesting of the three as it brings additional functionality in the form of the Control Ring.
All of Canon’s RF lenses have a Control Ring incorporated in their design which allows you to change settings on the camera such as aperture, shutter speed, ISO or exposure compensation. The Control Ring Mount Adapter brings that same functionality to your non-RF lenses.
The ring has a nice fluid motion as it turns, with definite clicks letting you know that you’ve reached the next 1/3rd of a stop. As somebody who grew up with manual film cameras, having the control ring operate the aperture gives me a sense of nostalgia, without the drawbacks of having to wait for my prints to come back.
A lot has been written on the Sigma 35mm f/1.4 Art, from its shallow depth of field and beautiful bokeh, to its robust construction. And it’s all true. Since the restructuring of their lenses into Art, Sport and Contemporary lines, Sigma has repeatedly shown that they have grown up and can compete with the likes of Canon and Nikon when it comes to producing high quality glass. Often Sigma releases a lens which is not available in a native format (neither Canon or Nikon have 1 135mm f/1.8) or that nobody produces (120-300mm f/2.8). Sometimes, as is the case with the 35mm f/1.4 Art, they release a lens which Canon, Nikon or Sony haven’t updated in a while.
The EOS R is Canon’s first full frame mirrorless camera. While it was initially criticized by a number of influential photographers for lacking a number of “must have” features, but that hasn’t stopped many professional photographers switching to the new system.
Most of my photography experience is behind Canon bodies, mainly the 70D, 7D mk II, 6D and 5D mk III, so I’m very familiar with the more mature systems that are cousins to EOS R. Having spent some time with the R it’s very clear that this is a Canon body in every single way. The biggest issue I found was the relocation of the Quick Control Dial from the lower right of the body, around the Set button, to the top right, in a position more familiar to Nikon users.
EVFs make me a little nervous, not just because there are some awful implementations out there where the screen lags behind camera movements, but as I tend to be somewhat susceptible to discomfort from using some of them. Thankfully the EOS R’s viewfinder works well, and didn’t give me any issues.
So we have a combination of the first Sigma Art lens, and Canon’s first full frame mirrorless camera, with the Control Ring being the glue to bind everything together. What does that give us? A lightweight, highly capable system, that is packed with the latest technology that Canon has to offer.