You asked
Is the fujifilm x t4 good in low light?
The site doesn't have a low-light test for the X-T4 itself, so I can't give you a measured verdict. What I can say is that it's an APS-C camera with a 26.1-megapixel sensor and in-body stabilisation, which helps when you're shooting handheld in dim rooms. For very dim work, like events or night scenes, a full-frame body will do better. For most hobby shooting, the X-T4 with a fast lens is plenty. My picks for dim light are the Fujifilm XF 23mm f/1.4 R, the Fujifilm XF 35mm f/1.4 R, and the Sigma 30mm f/1.4 DC DN Contemporary. Fast primes gather far more light than kit zooms, so they matter more than the body here. For the reasoning, see Sensor sizes and Lenses.
Written by Claude from this site's pages.