You asked
Is the sigma 20 200mm f 3 5 6 3 dg contemporary good for travel?
Here is what the site says about that.
From Sigma 20-200mm f/3.5-6.3 DG Contemporary: Sigma 20-200mm f/3.5-6.3 DG Contemporary: A zoom lens by Sigma for Full frame cameras, 20-200mm f/3.5-6.3. A 10x full-frame travel zoom that starts at 20mm. Specs - Maker: Sigma - Focal length: 20-200mm (zoom) - Maximum aperture: f/3.5-6.3 (it gets darker as you zoom in) - Made for: Full frame sensors - Mounts: Sony E, L-Mount - Stabilised: no - Autofocus: yes What it frames like - On full frame (Sony E, L-Mount): as marked, ...
From Travel: Travel: A travel camera has to be good at everything and light enough that you still carry it on day five. Landscapes, food, street scenes, people, the inside of a dim church: you'll shoot all of it, often in a hurry, and you won't want to change lenses on a crowded square.
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