I have the 33mm 1.4 Fuji lens & absolutely love it. It is able to focus very quickly & accurately. The lens contrast is very good & I do not mind the size of this lens when paired with my Fuji XT-3 camera.( I like to shoot with the battery grip attached to my XT-3, although I know others may not like to use a battery grip for their shooting needs.) I also have the Fujicrons f/2 lenses, 23mm,35mm & 50mm. They are wonderful, tiny & compact & pair well with any of the Fuji camera bodies. They offer exceptional value for their respective price points. I have not used or owned any of the Viltrox lenses, but reviews on this lens have been very complimentary with respect to build quality, autofocus performance & cost.