You asked
Is the sigma 24 105mm f 4 dg os hsm art good on aps c?
On an APS-C body, I think this is a very sensible walkabout zoom. It's stabilised and autofocuses, and the crop gives you a useful reach. On Canon APS-C it frames like roughly 38-168mm on full frame, and on Nikon APS-C about 36-158mm. The f/4 aperture behaves like about f/6 to f/6.4 for depth of field, so it's a bit less shallow than on full frame.
It's made for full frame, so you're using the middle of its image circle, but that's exactly what APS-C bodies are built for. If you're shopping for a body to pair with it, the Canon EOS 80D, Nikon D7500 and Nikon D500 are all listed as compatible APS-C options.
For a one-lens trip, the Travel page explains why a versatile zoom like this is a good choice.
Written by Claude from this site's pages.