You asked
Best travel lens for the panasonic lumix g100?
For travel on the Lumix G100, I'd start with one zoom that covers most of the day. The Panasonic Leica DG 12-60mm f/2.8-4 gives you 24-120mm equivalent, which handles wide streets, food and people with one lens. If you shoot dim interiors and evenings a lot, the Panasonic Leica DG 12-35mm f/2.8 is a smaller, faster option, at 24-70mm equivalent.
Add a small fast prime for evenings and close-up food. The Panasonic Lumix G 20mm f/1.7 II is a sensible pick, and it's 40mm equivalent.
The G100 has no stabilisation in the body, so favour a stabilised lens for handheld interiors. Check each lens page before you buy. For the full kit list, see Travel.
Written by Claude from this site's pages.