The Rubin 37mm to 80mm f2.8 is an excellent vintage zoom lens. It is mounted in M42 and has been adapted to Canon EF. This is the widest lens in the Jupiter set that can be mounted to Canon EF. The look of the lens is one of my favorite vintage looks. It is very similar to the Jupiter 35mm f2.8, and that is essentially my favorite lens.
This lens covers full frame cameras, Super 35mm and m4/3. The set covers the extreme telephoto side because it spotlights rangefinders which are wide angle with a telephoto compression.