Get less ISO noise at higher ISO sensitivity

[dolina]

This has been verified by me with EF bodies from 2003 EOS 10D up to 2015 EOS 5Ds R.

RF bodies like the 2020 EOS R5 & 2022 EOS R7 may have this. Owners may want to verify.

To reduce whatever ISO noise Canon has a weird ISO increments of every ISO 160.

So ISO

- 160
- 320
- 640
- 1250
- 2500
- 5000
- 10,000
- so on and so forth

These ISOs are cleaner than the next 1/3rd bump or bump down

[Tannin]

Really? I understood that the days of hard-coded differences in ISO processing (and thus noise) were gone long since, and you could these days use any ISO and get your noise improvements on a "pro rata" basis, so to speak.