The two things that immediately stand out about the Tamron 35-150mm f/2 - f/2.8 (for Sony) (B&H / Amazon), just by looking at it:
The focal length range: 35-150mm is an incredibly useful range for photographing people.
The fast maximum aperture. A surprisingly f/2.0 at 35mm, going to a very usable fast f/2.8 as you zoom in.
This would immediately make it an ideal one-lens option that would cover to many different photo sessions. I show some examples lower down in this review, which include engagement Read more inside...