Lightweight and compact 50mm F1.4 G Master primeSony's latest lens technology delivers extraordinary resolution and bokeh in a compact, lightweight lens. Extraordinary Af, smooth operability, and rugged reliability add the finishing touches to this innovative large-aperture standard prime lens.Breathtaking G Master quality right out to the image edgesTwo high-precision Xa (extreme aspherical) lens elements effectively correct distortion and most types of aberration. This new optical design also employs an Ed (extra-low dispersion) glass element to suppress chromatic aberration. And with our original Nano Ar Coating Ii on lens surfaces, internal reflections that can cause flare and ghosting are dramatically reduced.Innovative optics and an F1.4 aperture deliver magnificent bokehInnovative optics and an F1.