The 7artisans f1/1 lens is an interesting alternative to a Noctilux; it's about a twentieth of the cost. It seems well made; the aperture scale isn't equally spaced, getting compressed as you go to f/16; there is no marking for f/11, and there are no click stops. It's coded as a Noctilux, but this doesn't always work; there is just the slightest movement in the bayonet on my M240: perhaps it's best to fully seat it, then try to turn the other way. It's a 'double Gauss' design, and said to give impressive bokeh. Here are a few snaps with it, all on an M240, tripod mounted, cable released, pull 100 ISO. I made no changes between exposures. All were imported into LR6, then uploaded to Flickr. I made no processing alterations. The exposures are left to right, top to bottom, f/1.1, 1.4, 2, 2.8, 4, 5.6, 8, 16. (No f/11) The point of focus is (supposed to be) on the rosebud in the centre; I used both the rangefinder and the EVF (the lens came correctly adjusted when tested against the provided scale.)
The images are small to make comparison easier. If you'd like some larger, just say so.