Sony 50mm f/1.4 Lens for Sony Alpha Digital SLR Camera Ultra-bright standard 50mm lens with f/14 maximum aperture for Sony Alpha digital SLR cameras Maximum magnification ratio (x): 0.15x.Provides superb clarity and visual accuracy even when shooting at fully open apertures indoors Employs in-camera Super SteadyShot image stabilization system to minimize blur from camera Circular aperture for low-light shots; 15-foot minimum focus distance; 55mm filter diameter Measures 256 inches in diameter and 169 inches long; weighs 8 ounces Please note this product is only compatible with A mount cameras