Body and handling
One thing that Canon definitely nailed is the body design. Compared with Sony's A7 III, and even the Nikon Z7, the EOS R handles better. Thanks to the large grip, it feels like you're never going to drop the camera, even in slippery and wet conditions. And unlike with the A7 III, there's plenty of space for your fingers, with or without gloves. It's a bit heavier than its mirrorless full-frame rival, but it's weatherproof and feels almost bulletproof.
At 58mm, the RF mount is huge, yet it has a very short 20mm flange distance. Those design factors allow Canon to build better lenses with less glass. Take the new 50mm f/1.2 lens, for example -- it's much sharper than the DSLR equivalent, because it's way closer to the sensor. Many of the images I took with it are incredibly punchy and contrasty, even with the aperture wide open.
It's possible to build an EF DSLR lens with the same optical quality, but it would be much bigger and heavier. Canon is also set to ship the 28–70mm lens with a very fast f/2.0 aperture rarely seen in zooms, and that model is also crazy sharp.
That's why I'm so excited about the potential of the mount and EOS R system: Buyers already have a great choice of popular-focal-length lenses, and more are coming down the pike -- like the upcoming 35mm f/1.8 macro -- that take better advantage of the smaller mirrorless body.
The EOS R launched with four RF lenses, but that doesn't mean you're stuck with just those. If you have Canon EF full-frame or APS-C EF-S lenses already, three new adapters let you put them on the EOS R with no loss in quality.
The $100 adapter gives you full autofocus and exposure control, while the $200 version gives you the same control ring found on the native RF lenses. The $300 model adds a polarizing filter and, finally, the $400 model adds a neutral-density filter so that you can shoot in sunlight with a wider aperture -- ideal for videographers. Your autofocus accuracy might drop a bit using the adapters instead of a native lens, but otherwise, you get the same performance as you would on a DSLR.
Because of the electronic viewfinder and rear display, a mirrorless camera is never going to have battery life as good as an optical-viewfinder-equipped DSLR. Nevertheless, the EOS can go for a decently long time on a charge. For regular shooting, you can expect to get upwards of 600 to 700 shots, and if that's not enough, a battery grip is available. It takes standard Canon LP-E6N batteries, and many folks (like me) have plenty of those lying around already.
On the connection side, you've got microphone and headphone inputs, along with USB-C and micro-HDMI, all of which you'd expect on a premium full-frame camera. You can run it and charge the batteries on USB-C, but if you don't use Canon's own charger, be sure that any third-party model has enough power to do the job.
Unfortunately, there's only one SD UHS II card slot. It hasn't affected me so far, but Tony Northrup, another attendee at the Canon event, had a card failure on his muddy waterfall hike. He lost several key video clips, which was bad enough. It could have been catastrophic, though, had it been wedding or baby shots, as he mentioned.
As such, the lack of a dual card solution will simply be a nonstarter for many professionals. Many rival cameras, like Fujiflm's X-T3 and the Panasonic GH5, do have dual SD UHS-II card slots.
The Canon EOS R also has no in-body stabilization. That makes it a serious challenge to use with its two best lenses, the 50mm f/1.2 and the 28–70mm f/2.0, as neither of those is stabilized. And again, the EOS R's two cheaper rivals, the A7 III and Z6, both have 5-axis stabilization.
One place the EOS R beats the Sony A7 III is with its 3.69-million-dot OLED EVF. It's brighter, packs more resolution and has a faster refresh rate. To save money, apparently, Sony endowed its A7 III with a 2.36-million-dot OLED EVF -- a funny decision, considering that it probably manufactures the model Canon uses. The EOS R EVF is so good that DSLR shooters won't miss their optical viewfinders (much).
Finally, the EOS R has a fully articulating, flip-out rear touch display that's ideal for vloggers. That beats a lot of recent models, including the Nikon Z6/Z7, Sony A7 III and Fujifilmi X-T3, all of which have tilting but not flip-out displays. The video record button is also on top, rather than around back, so self-shooters won't have to fumble.
When I first saw the EOS R, I felt Canon had made a smart move by switching up its controls. Now I'm not so sure. I thought the multifunction bar was weird, but that I'd get used to it. After a couple of weeks of trying, however, I found it's simply too easy to activate by accident. You can enable the half-second touch activation for safety, but that's bound to slow you down. It's just too fiddly to use, and I ended up turning it off.
Then there's the touchscreen autofocus point selection system. The EOS R has no joystick, so this is what you're supposed to use to select the autofocus region. Unfortunately, it's simply too unreliable. It takes multiple swipes to move it from side to side, and it's too easy to bump it by accident. Again, I've turned off that function and am using the menu control buttons instead.
I don't particularly care for the new control dial positions either, both of which are now on top, but I've gotten used to them. I'd also rather have the power switch on the right side, near the shutter button, where it's easier to access. However, I do like the control ring on the new lenses and use it to control the ISO setting, giving me easy access to all the major exposure controls.
I like the menus also. You can switch from group to group using the "info" button, then move between controls via the D-pad-like controller. The groups are well organized, and it's relatively easy to find key comments. By contrast, Nikon's system is a major pain to use, forcing you to scroll endlessly to find key commands. I like Canon's system better than that of any other camera maker except Blackmagic Design.
Autofocus is either great or average, depending on what you're doing. For snapping photos, it's not as fast as Sony's hybrid system on the cheaper A7 III. The face and eye tracking also can't hold a candle to Sony's system. And it can't compare to DSLRs like Nikon's D850, or even Canon's own models.
AF affects shooting speeds, too. On paper, the EOS R isn't much slower than the Sony A7 III, with a max of 8fps, as compared with 10fps for the A7 III. However, with continuous autofocus enabled -- a must for sports or wildlife shooting -- speeds drop down to 4.5fps, while the A7 III can shoot at 8fps. So the EOS definitely isn't for sports photography.
In the real world, when snapping in continuous AF mode, I found that the EOS R would nail about three-quarters of my shots in bright light, and fewer in dimmer conditions. Again, that's a result that doesn't hold up to its main rival, the A7 III. In my tests, I found the EOS R lacking against Nikon's Z7, too.
Even in single-shot mode, the EOS R AF is hit-and-miss. When I used it with the 50mm f/1.2 lens, it would occasionally struggle with focus if I tried to shoot quickly, particularly in low light. I realize that lens isn't made for sports photography, but it held me back with street and candid photography, where you might just have a split second to grab the ideal shot. (By contrast, this lens does have incredible optics; more on that shortly.)
Video autofocus performance is a more uplifting story. The Dual Pixel system is renowned for nailing focus on faces and objects, time after time, in most circumstances. On the EOS R, it works better than ever. For instance, when I was shooting people in low light or while hiking, it absolutely nailed focus nearly every time. It truly is an uncanny system, and far superior to any other I've tried. (Looking at you, GH5s and Nikon Z7.)
If you're using vintage lenses or just want to focus manually, Canon makes it a bit easier than before with the EOS R. It now offers focus peaking, delineating the parts of the image in focus with a colored line. You can use it at the same time with the "Dual Pixel Focus Guide" feature, which shows the focus position relative to the subject. Canon points out that it's "especially helpful when recording movies." When using it with an older Tamron lens, I found it worked well.
Together with the flip-around screen, that should make it ideal for vlogging and action shooting, right? Welp, not so fast. My biggest problem with this camera is the 1.8x crop factor when shooting 4K video. For that, the EOS R has a narrower field of view than APS-C cameras and just a shade better than Micro Four Thirds. That negates many of the full-frame sensor's advantages, like the improved low-light performance and the narrower depth of field to make your subjects stand out.