You asked
Best travel lens for the panasonic lumix s1?
For a travel zoom on the Lumix S1, I'd start with the Panasonic Lumix S 24-105mm f/4 Macro OIS. It covers wide to short telephoto, and its stabilisation helps in dim churches. The S1 is big and rugged, so every bit of weight counts on a long day. If you want more reach, the Panasonic Lumix S 28-200mm f/4-7.1 Macro OIS covers nearly everything with one lens, at the cost of brightness.
For evenings and food, pair either zoom with a small fast prime such as the Panasonic Lumix S 35mm f/1.8. That's the classic travel kit, as the travel guide suggests.
Written by Claude from this site's pages.