Canon R3

[Fast Glass]

I echo all the sentiments. The idea of maybe thinner metal being a differentiator came immediately to mind. But Canon has said that the construction and weather sealing are at the same level. So that rules that out.

Both shutters are rated the same. So no big difference there.

So it leaves me with maybe the electronics are better? I'm not sure what else is left to improve otherwise. Not getting any good indication purely based on operating range. So it does leave me puzzled. Maybe just not as high quality electronics? But as Joel has said. There are many very old cameras from Canon that have lasted a very long and useful life that are not even built as tough as the 1-Series.

But when comparing the 1Dx III to the R3. The nerd in me still wants to know. I want to know if there is a difference worth noting. Because if it is as significant as Canon says. Then it can be something a hard core pro might be concerned with. Or at least keep their existing 1Dx III bodies handy if the R3 fails in grueling conditions.