You asked
Best travel lens for the olympus om d e m5?
For travel on the OM-D E-M5, I'd start with the Olympus M.Zuiko 12-100mm f/4 IS PRO. It covers about 24-200mm in full-frame terms, so one lens handles wide streets and distant details. If you want something lighter, the Olympus M.Zuiko 12-45mm f/4 PRO covers about 24-90mm and is easier to carry all day.
Then add a small fast prime for evenings and food, like the Olympus M.Zuiko 25mm f/1.8, which frames like a 50mm. My travel kit is one zoom plus that prime, and I'd leave the tripod at home. For the reasoning behind this, see Travel.
Written by Claude from this site's pages.