SONY - FE 50mm F1.2 GM

This 50mm F1.2 G Master prime lens is a creator's dream, with an F1.2 maximum aperture that not only allows shooting in a wider range of lighting conditions, but also provides an extraordinary combination of high resolution, luscious G Master bokeh, and blazing autofocus. It is also remarkably compact and lightweight, for new creative freedom.

Image-wide sharpness from F1.2
Resolution and contrast are outstanding throughout the aperture range, right up to F1.2. Three XA (extreme aspherical) lens elements in an advanced optical path subdue overall aberration, and other advanced optical technologies minimize chromatic aberration in a lens that is surprisingly compact and lightweight.
Smooth, refined G Master bokeh
Three XA (extreme aspherical) elements with 0.01-micron surface precision, plus painstaking spherical aberration control at the design and manufacturing stages, contribute to gorgeous G Master bokeh that can really make portrait and other subjects stand out, especially at the lens's maximum F1.2 aperture.
Bokeh-enhancing 11-blade circular aperture
A new 11-blade circular aperture mechanism contributes to beautiful bokeh. Circular highlights are exquisitely rendered too, further enhancing the widely acclaimed beauty of G Master bokeh. Out-of-focus backgrounds are smoother and more pleasing in just about any situation and lighting.
Nano AR Coating II ensures clear images in backlit scenes
Sony's Nano AR Coating II helps to achieve clear, well-defined images even in strong sunlight and backlighting. This advanced coating is evenly applied to entire element surfaces, effectively minimizing internal reflections so that flare and ghosting do not occur. 
XD Linear Motors achieve fast, precise, quiet AF and tracking
Fast, accurate focus is assured even with shallow F1.2 depth of field. Four XD (extreme dynamic) Linear Motors deliver high thrust to position the large, heavy focus groups for precision AF and tracking. High resolution is maintained at all focusing distances with the full AF speed and precision of E-mount bodies, for both stills and movies.
Natural, linear manual focus response
Linear Response MF ensures that the focus ring responds directly and linearly to subtle control when focusing manually. Focus ring rotation translates directly to a corresponding change in focus, so control feels immediate and precise. Linear Response MF enhances manual focus control for both stills and movies.
Customizable focus hold button and more for advanced control
Focus hold buttons located on the top and side of the lens can be assigned to a number of other functions via a camera body menu, providing direct access to functions that are vital to the user's personal workflow, including right/left eye selection for Eye AF on bodies that support that feature. 
Aperture ring with click on/off switch
An aperture ring is also provided for direct, intuitive aperture control. A handy switch allows the aperture ring click stops to be turned off for quiet movie shooting.
Dust and moisture resistant design
A dust and moisture resistant design provides the reliability needed for outdoor use in challenging conditions.

Specifications

Filter Diameter (mm) : 72
Weight : 778 g (27.5 oz.)
Format : Full Frame
Focal-Length (mm) : 50
Focal Length (35mm) (APS-C) : 75
Lens Groups / Elements : 10-14
Maximum aperture (F) : 1.2
Minimum Aperture (F) : 16
Aperture Blades : 11
Circular Aperture : Yes
Minimum Focus Distance : 0.4 m (1.32 ft)
Maximum Magnification ratio (x) : 0.17