You asked
Is the sigma 28 105mm f 2 8 dg dn art good on aps c?
On APS-C, this lens turns into a 42-158mm equivalent, which is a handy everyday range. It covers wide scenes at the short end and gives you a comfortable portrait length at the long end. The f/2.8 stays bright, but the depth of field behaves like f/4.2, so you get less background blur than you would on full frame. If you want more separation, the focal length converter shows the maths.
It fits APS-C Sony bodies, so I'd pair it with an a6700, a6600, a6400 or ZV-E10 II. It isn't stabilised, so rely on the body's stabilisation if it has any, or keep your shutter speed up.
For the full picture, see the Sigma 28-105mm f/2.8 DG DN Art page.
Written by Claude from this site's pages.