You asked
Is the nikon z50 good in low light?
The Z50 is decent in low light, but it's an APS-C camera, so it trails full frame by roughly one stop. You'll get cleaner images by using fast lenses rather than relying on the body. The Nikon Z 20mm f/1.8 S, Viltrox AF 23mm f/1.4 and Nikon Z DX 24mm f/1.7 all gather plenty of light for the money.
The Z50 has no stabilisation in the body, so for slow shutter speeds pick a stabilised lens such as the Tamron 17-70mm f/2.8 Di III-A VC RXD. For the bigger picture on sensor size, see what a bigger sensor buys you, and for why primes help in dim light, see primes or zooms. The full lens list for the camera is on the Nikon Z50 page.
Written by Claude from this site's pages.