SonyAlphaBlog tested the Sony 50mm f/1.4 GM and concluded:

The Sony 50mm F1.4 GM is a superb 50mm for Sony E mount : one of the most compact and light in its class, superb optical performances (sharpness , bokeh, color rendering…) , ergonomics (click/clickless aperture ring ) and perfect AF

Sony 50mm F/1.4 GM at BHphoto . Amazon . Adorama . FotoKoch . FotoErhardt . Calumet DE . WexUK .