You asked
Is the tamron 28 200mm f 2 8 5 6 di iii rxd good for travel?
Yes, I think it's a good travel lens, with one caveat. The 28-200mm range covers wide street and landscape shots through to tighter details, so you can change focal length without swapping lenses on a crowded square. It's a full-frame zoom, so it suits the full-frame option in my travel picks. The aperture narrows as you zoom, and it isn't stabilised, so keep an eye on shutter speed in dim churches.
I'd pair it with a compact body such as the Sony a7C II to keep the kit light, or the Sony a7 III if you want more grip and handling. For more on focal lengths, see Lenses.
Written by Claude from this site's pages.