Overview

The MC Rubinar 500mm f/5.6 is a Russian-made mirror lens with a fixed aperture and M42 mount, noted for its metal construction and improved anti-reflective coating. Optically, it produces distinctive donut bokeh but suffers from softness, especially at close distances; sharpness is acceptable at longer distances. Build quality is solid, though the lens is heavy and larger than expected, with hand-engraved markings. It suits creative photographers who value bokeh effects over sharpness, and is also suitable for astrophotography.