You asked
Sony a6000 vs sony a5100?
The a5100 and a6000 share the same core spec: 24.3-megapixel APS-C sensor, Sony E mount, announced in 2014, and no stabilisation in the body. The difference is the build. The Sony a5100 is the tiny one, with a flip-up screen and no viewfinder. The Sony a6000 is the long-running bestseller and the cheaper used way into Sony APS-C. My pick is the a6000 for most people.
Both take the same lenses, so the choice of lens matters more than the body. Since neither camera has stabilisation, I'd lean toward lenses with OSS. Good everyday options are the Sony E 18-55mm f/3.5-5.6 OSS, the Sony E PZ 16-50mm f/3.5-5.6 OSS, and the faster Sony E 16-55mm f/2.8 G. For more on choosing a first setup, see your first camera.
Written by Claude from this site's pages.