You asked
Best travel lens for the olympus om d e m1 mark iii?
For the E-M1 Mark III, I'd start with the Olympus M.Zuiko 12-45mm f/4 PRO. It covers roughly 24-90mm in full-frame terms, which handles most travel scenes with one lens. If you want more reach, the Panasonic Leica DG 12-60mm f/2.8-4 goes to about 120mm. For the widest travel zoom, the Olympus M.Zuiko 12-100mm f/4 IS PRO reaches about 200mm, but it's a bigger carry.
The camera already has in-body stabilisation, so you don't need a stabilised lens for dim churches or markets. Pair your zoom with the Olympus M.Zuiko 25mm f/1.8 for evenings and food. For what to weigh up, see travel camera tips.
Written by Claude from this site's pages.