I agree, in a similar fashion, most people who critise Ferarri's have never actually driven one.
Are you suggesting true dual base ISO, or just multiple amplifier stages. The latter is not new.
Extended ISO 50 in Canon cameras has the same dynamic range as ISO 100 - we didn't see the actual measurements for the R1 but it's unlikely it'll be any different from the R3, R5, R5Ii, R6, R6II.
It won't make any perceptible difference for shutter speeds you'd typically use in action shooting.
Looking at the noise pattern at 300% zoom, there is a noticeable reduction in noise at ISO 1600.
The R3 has reductions in read noise at ISO 400 and again at ISO 1250. The ISO values at which the amplification changes does shift from model to model, e.g. the R5 has one drop at ISO 400 while the R5II has that drop at ISO 500. Still not convinced you're seeing something new.
I think we are all waiting for photons to photos to get their hands on a R1, do some tests and update this chart. Currently, according to Photons to Photos, the R6ii / R8 is best low iso performer in the Canon range with the R3 coming in a close 2nd place.
FYI, he doesn’t actually test cameras himself. Users send him raw files to his specifications and he tests those. Sort of a crowd sourced effort.
The R3 is 0.4 stops better at ISO 100. The R62/R8 is slightly better from ISO 200 to 800 (with the biggest difference of 0.3 stops at ISO 320), then the R3 is slightly better the rest of the way up.
