You asked
Best camera for the sigma 19mm f 2 8 dn art?
The Sigma 19mm f/2.8 DN Art is at its best on an APS-C body, where it frames like a 28mm on full frame. My everyday pick is the Sony a6400, a native APS-C camera that uses the lens as it was meant to be used, with the whole Sony E range behind it.
If you want to spend less or travel lighter, the Sony a6100 does the same job with fewer extras. For a compact Micro Four Thirds setup, the OM System OM-5 Mark II pairs well with it. There the lens frames like a 38mm and gives the depth of field of about f/5.6.
Already own a full-frame Sony like the Sony a7 III? The lens still works there in APS-C crop mode, at fewer megapixels. For a wider look at lenses by brand, see Lenses.
Written by Claude from this site's pages.