This is a 21mm prime lens (f/3.5 aperture) for the Olympus OM system (silver halide film). [Lens Condition] - Smooth helicoid operation - Smooth aperture ring operation - Aperture preview button functions - No oil on aperture blades - Scratches/dents on the aperture adjustment ring knurling - No lens mold - There appears to be something like overflow on the ink application of the center element - Dust and debris present - No deterioration or stickiness on the focus ring rubber knurling [Included Accessories] - Front and rear lens caps - Genuine lens case (no deterioration of the internal cushion urethane)