This is a standard zoom lens for SIGMA's APS-C cameras. The focal length is approximately 27-80mm in 35mm equivalent, and it is equipped with an ultrasonic motor "HSM," so I believe the autofocus is quiet and fast. Also, it is bright at F2.8 throughout the zoom range and has an image stabilization system that provides about 4 stops of correction, making it an easy-to-use lens. I am selling it due to equipment consolidation. There is no mold or fogging in the lens, but there is some dust contamination that does not affect shooting. The exterior has no noticeable scratches, but there are scuffs on the hood and lens caps. All shooting operations, including autofocus, aperture operation, zoom operation, and image stabilization, are in good condition. Photos 14 and 15 are samples taken with the lens attached to a mirrorless camera via a mount adapter. Accessories include lens caps (front and rear), a protective filter, the genuine hood, and a storage case. Below is an excerpt of the specifications. Compatible mount: EF mount Sensor format: APS-C Focal length: 17-50mm Minimum focusing distance: 28cm Filter size: φ77mm Maximum diameter x length: φ83.5mm x 91.8mm Weight: 565g Size...Canon EF mount