Olympus 15mm F/8 body cap is pretty unique yet very simple product. The idea is simple: take a camera body cap, put a simple triplet lens inside, attach it to a mechanical focus lever and sell it. No one will have high IQ expectations so it can’t dissapoint, it will be a cool gadget to have and the smallest usable lens for mirrorless system. I guess development cost was next to nothing, and production cost must be a joke. So let’s see how it performs.