You asked
Best budget lens for the sony a7s?
I don't list prices on the site, so I can't tell you what's cheapest. What I can do is point you to lenses on the Sony a7S page that are built to be affordable and still good on a full frame body like this.
- Meike 35mm f/2 STM is a simple, light 35mm with autofocus, a good all-round lens for everyday shooting.
- 7Artisans AF 35mm f/1.8 gives you a faster aperture for low light and a softer background.
- Sony FE 28-60mm f/4-5.6 is the one to choose if you want a single zoom for everything.
My pick is the Meike 35mm for the money. The a7S has no stabilisation in the body, so if you shoot slow, look at the stabilised options on that page too. For how to balance lens and body spending, see your first camera.
Written by Claude from this site's pages.