This Chinese made, manual focus lens is available in various mirrorless mounts, mine is Fuji-X bayonet. It's nicely made in aluminium with (I think) brass helicoids, and perfectly damped, with focus ring and aperture having just the right amount of resistance. There's no slack in either and the lens looks and feels like a quality item. The packaging reflects the boutique feel, with an upmarket Western design not unlike Fuji's own silky black boxes. The 25mm 1.8 is about the same size as an Industar 50mm 2.8, for anyone familiar with old Soviet rangefinder lenses, projecting forward slightly more than the width of my X-Pro1 body, with the tapered-in body style of Fuji's 23mm and 35mm f2 native lenses. Operation is better than any Russian lens I've owned, more German in feel than anything. The finish is virtually identical to the X-Pro, and aesthetically a good match. Performance is slightly old fashioned to anyone used to modern digital lenses, sharper in the centre than the edges wide open, improving as the lens is stopped down before diffraction is apparent at f16. Out of focus details are always attractive, with none of the background busyness of some lenses and an almost Leica-esque feel to contrast and definition. Given a suitable editing pre-set, it would give a very good imitation of a classic film rangefinder optic, offering plenty of detail without the biting contrast of a modern lens. 25mm (37.5mm via Fuji's APS-C sensor) may seem an odd focal length, but the 24mm OVF frame shows no difference to the 25mm EVF, and most users would use the two interchangeably. The perspective is like the 38mm once favoured by film point and shoot cameras. If you want something wider than a FF 50mm and close to the theoretical human field of view, it's definitely worth a try. The only complaint I have is the focus scale, which is sufficiently at odds with the reality through the EVF to make scale/zone focus a non-starter. The barrel contains feet and metre distance engravings, progressing (in feet) from 0.6, 1, 2, 5, 16 and infinity markings. Subjects at approximately 5ft - pin sharp at f1.8 though the EVF - showed closer to the 16 ft than 5 ft markings, and the void between the two makes hyperfocal shooting a gamble. It's possible, but you'd have to work out your own sweet spot and most users will confirm distance through the viewfinder. I assume the discrepancy is the result of the same lens being produced for a variety of sensor formats. Who will it appeal to? Not an existing owner of the Fuji 23mm f2, who won't trade autofocus and exemplary optical performance. I think its market will be people buying first generation X-Series cameras on the used market whose budget won't stretch to new Fuji lenses, adapted lens fans who are looking for something more compact than an adapter allows, or photographers who want a slightly old school, film era feel. The bottom line is the price. Mine cost £51.00 new via eBay from China, which puts the 7artisans 25mm 1.8 in the same market segment as used FSU lenses that are decades old and of uncertain provenance. Probably even cheaper given the paucity of good lenses around 24mm mark. Add the convenience of a Fuji mount and the attraction is obvious. Edit: perhaps this review should be in the X-mount forum?