You asked
Is the sirui sniper 33mm f 1 2 good in low light?
Yes, for low light the 33mm f/1.2 is one of the strongest options on the site. Its f/1.2 maximum aperture lets in a lot of light, and that is the main thing that helps in dim rooms, at events, and at night. It's an APS-C lens, so it frames like about 50mm on full frame, which suits people and food well.
Keep two limits in mind. It isn't stabilised, so you'll want a faster shutter speed or a steady stance. And f/1.2 is wide, so focus is very thin. Check the Sirui Sniper 33mm f/1.2 page for the bodies it fits. For more on why light matters more than sensor size, see Sensor sizes. For a general starting point, see Lenses.
Written by Claude from this site's pages.