This is a Tamron AF 28-200mm f/3.8-5.6 Aspherical zoom lens, model number 71DP. Focal length: 28-200mm, covering wide-angle to medium telephoto, making it a typical all-around zoom lens. Aperture: f/3.8-5.6, with a maximum aperture of f/3.8 at 28mm and a maximum aperture of f/5.6 stopped down at 200mm. Filter diameter: 72mm, minimum focusing distance: 2.1 meters. Made in Japan, serial number 403783. This was an early entry-level all-around zoom lens from Tamron, emphasizing its "all-in-one" convenience. It was a very popular travel lens during the film camera era, compatible with SLR cameras of the time (such as Nikon and Minolta mount versions). It employs aspherical lens elements, which can correct distortion to some extent and reduce barrel distortion at the wide-angle end. Condition: Lens condition is as shown in the pictures. There are normal signs of use, the lens elements are clear, without fungus or haze, all functions are normal, zooming is smooth, and aperture adjustment works without issue.