You asked

What is the tamron sp af 17 50mm f 2 8 xr di ii ld aspherical if good for?

The Tamron SP AF 17-50mm f/2.8 XR Di II LD Aspherical (IF) is a classic, inexpensive f/2.8 standard zoom for APS-C cameras. I'd call it a good first fast zoom: it covers everyday street, travel and family shots, and the wide f/2.8 aperture helps in dim rooms. On Nikon and Pentax APS-C bodies it frames roughly like a 26-75mm on full frame, and on Canon APS-C about like a 27-80mm.

It isn't stabilised, so keep the shutter speed up in low light. For a body to pair it with, the Nikon D7500 and the Canon EOS 80D are sensible APS-C choices. For people in particular, see portraits, and for the rest of the kit, lenses.

Written by Claude from this site's pages.

From these pages