You asked
What lenses should I buy for the sony a9?
The Sony a9 is full frame, so lenses frame exactly as marked, and the catalogue for it is long. If you don't have a particular subject yet, I'd start with three:
- Sony FE 24-70mm f/2.8 GM II for everyday walking-around and people.
- Sony FE 16-35mm f/2.8 GM II for wide landscapes and interiors.
- Sony FE 70-200mm f/2.8 GM OSS II for sport, wildlife, and anything you can't get close to.
If you shoot mostly sport, the telephoto is the one to prioritise. If you're on a budget, the f/4 zooms on the same a9 page are worth a look. Before you commit, check the three questions on the home page. A lens mount lasts longer than a camera body, so think about the lenses you'll want in two years, not just today.
Written by Claude from this site's pages.