Kamero Auto 135mm f/2.8 telephoto prime lens with original-style Kamero carrying case and shoulder strap. The front ring is marked KAMERO AUTO 1:2.8 f=135mm, serial No. 146351, with a 55mm filter size. This model is documented as an M42 screw-mount manual-focus lens with an f/2.8 maximum aperture. - Brand: Kamero - Focal length: 135mm - Maximum aperture: f/2.8 - Mount: M42 screw mount - Manual focus - 55mm filter size - Serial No. 146351 - Black metal lens body - Includes Kamero cylindrical carrying case - Black exterior case with red interior lining - Shoulder/carrying strap included - SKU: 2543373