This is a telephoto zoom lens for Sony A-mount. It's an older lens from the film era, but it can be used with both full-frame and APS-C cameras. It's an APO (apochromatic) lens, which means it uses special materials like extra-low dispersion glass to minimize chromatic aberration. By correcting red, blue, and purple chromatic aberrations so that the focal length of each color is the same, APO lenses offer a higher level of image quality compared to non-APO lenses. I purchased this lens used several years ago. The exterior has no noticeable scratches, but there are some scuffs. There is no mold or fogging, but there is some dust inside the lens that doesn't affect image quality. Zoom operation, autofocus, and aperture function are all good. Photos 14 and 15 are sample images taken with an α200. Included accessories are the hood, protective filter, and lens caps (front and rear). Here are some specifications: Mount: Minolta A-mount Focal Length: 100-300 mm Maximum Aperture: F4.5-5.6 Filter Diameter: 55 mm Dimensions: 73.5 x 101.5 mm Weight: 435 g