So camera full-frame sensor probably best bet.The sensor design also plays part.Backside illuminated sensors , example , keep circuitry way light reach sensor ’ photo sites.But general rule , pixel count full-frame sensor APS-C Micro Four Thirds sensor , pixels bigger full-frame sensor capture light perform better low light conditions.For sensor size means low light performance , check guides APS-C vs full-frame Understanding camera sensor size.Likewise , two cameras size sensor , camera lower resolution sensor perform better low light.For example , Canon EOS R5 EOS R6 full-frame sensors , R6 better R5 noise control low light , owing lower resolution.It ’ also worth noting mirrorless cameras , better noise control low light help autofocus perform better AF system uses imaging sensor .