The Viltrox 28mm F4.5 has a better-than-expected build quality, coming with a metal mount, which was a pleasant surprise. The autofocus works well, is snappy, and, most of all, very reliable. Images from it are sharp and pleasant and while not one to boast much about bokeh, the output from the lens on the X-mount system is really good, making this lens a very value-for-money purchase and, most of all, a compact companion to one's lens repertoire.I like that the lens also has a USB-C port for firmware updates, which implies future support and improvements. A lens one should not miss.