This is a telephoto zoom lens for Sony A-mount. It's an old lens from the film era, but it can be used with both full-frame and APS-C cameras. It's a rare APO (apochromatic) lens. By combining special materials like special low-dispersion glass to suppress chromatic aberration, it corrects color fringing and ensures that the focal length of each color is the same. Compared to non-APO lenses, I think you can get a higher level of image quality. I bought it used a few 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 that doesn't affect the photos. Zoom operation, autofocus, aperture operation, etc. are all good. Photos 12 and 13 are sample shots taken with an α350. Included accessories are the hood and lens caps (front and rear). Here are some specifications: Compatible mount: Minolta A-mount series Focal length: 100-300 mm Maximum aperture: F4.5-5.6 Filter diameter: 55 mm Maximum diameter x length: 73.5 x 101.5 mm Weight: 435 g