The Kern-Paillard 16mm f1.8 Switar H16 RX is a tiny lens designed for use on the Bolex H16 Reflex, but its C mount allows it to be used on many modern cameras with an adapter (not included). Worth noting that the image circle of this lens provides coverage for 16mm film, so you're not getting anywhere near full-frame coverage: it hard-vignettes even on Micro Four Thirds. For best use, you'll want a camera that can crop down to 16mm format, like some Blackmagic and Red cameras- and it is, of course, compatible with good old fashioned Bolex H16 RX cameras, too. This lens is in good condition, with smooth focusing, light wear on aperture blades, minor internal dust.