You asked
Best travel lens for the panasonic lumix s5?
For travel on the Lumix S5, I'd start with the Panasonic Lumix S 24-105mm f/4 Macro OIS. It covers wide to short telephoto, which is most of what you'll shoot on a trip, and its stabilisation helps with dim churches and interiors.
If you want more reach, the Panasonic Lumix S 28-200mm f/4-7.1 Macro OIS trades some brightness for a longer range, so you can skip changing lenses on a crowded square.
For evenings and food, I'd add one small prime. The Panasonic Lumix S 35mm f/1.8 is a good match for the classic zoom-plus-prime kit.
The travel guide explains why one zoom and one fast prime is enough for most trips.
Written by Claude from this site's pages.