Is the sigma 23mm f 1 4 dc dn contemporary worth it?

Yes, if you shoot APS-C and want one fast lens for everyday work. On Sony E, Fujifilm X or L-Mount it frames roughly like a 34mm on full frame, and f/1.4 gives the shallow depth of field you'd expect from a fast prime. On Canon RF it's closer to 37mm equivalent. It's autofocus only, with no stabilisation, so you'll lean on good light and a steady shutter speed.

If you want a slightly tighter view, the Sigma 30mm f/1.4 is my pick for a first prime: cheap, sharp and fast. The 23mm suits you more if you want a wider, more documentary view. For where a fast prime fits in a kit, see your first lenses.

Written by Claude from this site's pages.