Something worth adding here for those who want to complicate their lives even more, these equivalences get complicated when you need to compare across different sensor formats (full-frame vs crop vs micro-4/3rds). Something I learned recently is that f/5.6 on a 300mm lens on a crop sensor is more similar to something like an f/8 or f/11 on a 450mm on a full frame. Including ISO into this makes that comparison more complicated as well.
More on that subject https://photographylife.com/equivalence-also-includes-apertu...