Neuro is our
AF expert and I'd imagine he'd have something to say about Fullstop's comment.
I believe EOS R's AF system will function very well in low light, but Canon appears to have pulled a marketing fast one here -- but just a bit. I've seen sensitivity claims made with everything from f/1.4 to f/2.8 lenses, but here they have indeed made the claim based on a f/1.2 lens.
But I don't believe the statement:
EV -6 to 18 (f/1.2, at 73°F/23°C, ISO 100, One-Shot AF)
Means that the AF sensitivity wheels come off the bus if you are not shooting an f/1.2 lens. I believe it gradually steps down with lens speed. Again, I await Neuro's take on this.
But in full fairness to Fullstop, it would appear that even if the focusing works in a dark cave as advertised, we're shooting in M if we do. His metering catch is a good one.
- A