You asked
Best travel lens for the sony a7 iii?
For a Sony a7 III, my pick is the Sony FE 24-105mm f/4 G OSS. It covers wide to short telephoto, which is the range most travel pictures need, and its OSS stabilisation pairs well with the a7 III's in-body stabilisation for dim churches and interiors.
If you want more speed and can carry the extra bulk, the Sony FE 24-70mm f/2.8 GM II is the one I'd look at. For the second lens, I'd add a small fast prime for evenings, such as the Sony FE 28mm f/2 or the Sony FE 20mm f/1.8 G if you like wider views.
Weigh the lens with the body before you commit, since anything that won't fit in your bag gets left at the hotel. The travel guide covers the other things to consider, and what to pack lists the extras to bring.
Written by Claude from this site's pages.