With Nikon not having anything in the 24mm range that is worth buying I picked up this sigma 16mm to give me a 24mm = lens.It is very sharp even at F 1.4. I have shot quite a bit with it now and it lives on my Z50 now most of the time.A great walk around lens for travel or anything and great in low light.If Nikon ever comes out with a pro version of Z50 I hope soon I could see using this lens on that new camera and picking up the sigma 56mm to get to 85mm at 1.4 that should = the Nikon 85mm 1.8 on Full frame for the most part but with a smaller lighter setup. I would buy two of them and use the 16 on one and the 56 on the other on jobs.Right now I like the Z50 but can not use it on jobs its just not up to it but I do have two Z6s I use.Back the Sigma 16mm its a great lens and good build quality.