◉ Set of adapter, lens filter, and lens hood (For old lenses / Micro Four Thirds compatible) * Features: This lens is characterized by a unique background blur known as "swirly bokeh." * Mount: Uses the M42 mount. * Specifications: Fixed focal length of 58mm, maximum aperture of F2.0. * Usage: By using a mount adapter, you can enjoy shooting with modern mirrorless cameras, etc. ※ Please check the photos. There are some scratches, etc. This is a used item. Please refrain from purchasing if you are sensitive to imperfections. Model Name: HELIOS-44M Focal Length: 58mm Maximum Aperture: F2 Mount Type: M42 mount Country of Manufacture: Former Soviet Union (USSR)