Mount... K-mount Focal length 28-75mm F2.8 This is a standard zoom lens for Pentax K-mount from Tamron. The contents include the lens, hood, front and rear caps, and a protector. Due to the large aperture, it can be used on full-frame cameras without vignetting. There is some fine dust inside the lens, but it does not affect the photos. There is no mold or clouding, and the optics are in good condition. Stored in a dehumidified storage.