You asked
Best travel lens for the canon eos r100?
For the Canon EOS R100, I'd start with the Canon RF-S 18-150mm f/3.5-6.3 IS STM. It covers about 29-240mm in full-frame terms, which handles nearly every travel shot with one lens, and it has stabilisation for dim interiors.
If you want a bit more range on the wide end, the Canon RF 24-105mm f/4-7.1 IS STM (about 38-168mm full frame) is a sensible everyday zoom. For evenings and food, add the Canon RF 24mm f/1.8 Macro IS STM as your small fast prime. That's the classic travel kit idea: one zoom plus one prime.
You can see every lens that fits the camera on its R100 page.
Written by Claude from this site's pages.