Is the tamron 18 200mm f 3 5 6 3 di iii vc good for portraits?

Not really. The Tamron 18-200mm f/3.5-6.3 Di III VC is a travel zoom. It covers a lot of range in one lens, but at f/3.5-6.3 it gets darker as you zoom in. That makes it hard to get a soft background or to shoot in dim indoor light, which are the things portraits usually need. It's also discontinued.

For portraits, I'd start with a fast prime. On APS-C, a 33-35mm f/1.4 to f/1.8 is a good first lens, and an 85mm is the classic portrait focal length. The portraits guide explains why the lens matters more than the body, and your first lenses covers what to add first.

Written by Claude from this site's pages.