Is the sigma 85mm f 1 2 dg art good in low light?

Yes, low light is one of the best reasons to own this lens. At f/1.2 it gathers far more light than an f/1.8 or f/2.8 lens, so you can keep your shutter speed up or your ISO down in dim rooms and evenings. The trade-off is very shallow depth of field, so nail your focus. The Sigma 85mm f/1.2 DG Art is not stabilised, so a body that handles high ISO well helps. From its list of compatible cameras, I'd look at:

• Sony a7S III: my pick for dim light.
• Sony a7 IV: a more all-round choice.
• Panasonic Lumix S5 II: full frame in a smaller body.

Full frame also gives roughly one stop of low-light advantage over APS-C at the same framing. The sensor guide explains why.

Written by Claude from this site's pages.