Fujifilm X-T2 & X-Pro2 // The Best
The new X-Trans III sensor featured in the Fujifilm X-T2 and X-Pro2 is a great low light performer from a crop sensor perspective. In many tests, it performs as well as an entry level full frame DSLR in regards to how it handles ISO noise and such. Additionally, while not best in class, the AF systems on the two Fujifilm flagship cameras are outstanding – though to be honest if you are shooting anything moving quickly in extremely low light you may have some issues depending on the situation.
That said, these cameras are becoming incredibly popular for a reason, and a large part of that is their improved low-light performance.
X-T20 // Not The Best, But Still Good
The X-T20 has that same sensor as the X-T2 and X-Pro2, and in many ways, it performs similarly. But there are some usability differences with the camera compared to the X-Pro2 and X-T2 that puts it a little behind the two flagships. It is still a very solid performer and will match the image quality of the two flagship cameras in virtually every way. Just when it comes to the handling in low light, it will not be as good, in our opinion, as either flagship.
X-T1, X-T10, X-Trans II Cameras // Not Great, But Far From Horrible
The last generation Fujifilm cameras featuring the X-Trans II sensor like the X-T1, and X-T10 are all solid cameras with a proven sensor and excellent image quality. But in low light situations, the AF is not great and the high ISO image quality is not the best either (depending on the situation), especially when compared to the newer X-Trans III based cameras.
So, if low-light is a priority for you, we recommend going with one of the newer X-Trans III based cameras over any of the X-Trans II cameras. That said, the X-Trans II cameras can do well enough if low-light is an occasional endeavor. They are also an excellent value right now too, so it’s something to really consider.