Mitakon Zhongyi 20mm f/2 4.5x Super Macro Lens (EF / E w/adapter)

Canon EF Mount/Full-Frame Format Aperture Range: f/2 to f/16 Magnification Range: 4.5x to 4x Minimum Working Distance: 0.8" Manual Focus Operation Metal Lens Barrel 3-Blade Diaphragm