The exterior, lens surface, and mount are all very clean, and there are no operational issues. It's incredibly light, making it highly portable. The image quality is great, comparable to GM lenses, but I personally think this is sufficient. I especially recommend it for those who want to focus on video. Lens Mount: Sony E-mount Compatible Image Sensor Size: 35mm Full-frame Focal Length (mm): 16-35 Focal Length (mm) ※1: 24-52.5 Lens Configuration (Groups-Elements): 12-13 Angle of View (APS-C) ※1: 83°-44° Angle of View (35mm Full-frame): 107°-63° Maximum Aperture (F-value): 4 Minimum Aperture (F-value): 22 Aperture Blades (blades): 7 Circular Aperture: ○ Minimum Focusing Distance (m): 0.28 (W) - 0.24 (T) Maximum Magnification Ratio: 0.23 Filter Diameter (mm): 72 Teleconverter (1.4x): Not supported Teleconverter (2.0x): Not supported Hood Type: Petal-shaped bayonet type Dimensions (Maximum Diameter x Length) (mm): 80.5 x 88.1 Weight (approx. g): 353