You asked
Sony nex 7 vs sony nex 5t?
The NEX-7 and NEX-5T both use APS-C sensors on the Sony E mount, so they take the same lenses. The main differences are age and resolution. The NEX-7 was announced in 2011 with 24.3 megapixels, a built-in viewfinder and three control dials. The NEX-5T came in 2013 with 16.1 megapixels. If you want the higher resolution and the NEX-7's controls, I'd pick the NEX-7.
Neither body has stabilisation, so for slow shutter speeds, choose a stabilised lens such as the Sony E 18-55mm f/3.5-5.6 OSS or the Sony E PZ 16-50mm f/3.5-5.6 OSS. For every lens that fits each body, see the NEX-7 page and the NEX-5T page.
Written by Claude from this site's pages.