Dpreview tested the Sony 50mm F1.4 review on APS-C and Full Frame DSLR namely the Sony Alpha 700 and Sony Alpha 900. Some extract from the review:
It gives excellent image quality when stopped down, but struggles somewhat when used wide open, showing common problems such as corner softness, halation, bokeh chromatic aberration, and vignetting on full frame.
Sony 50mm F1.4 clearly does have characteristics which make it a superior performer on the APS-C format. It shows unusually high central sharpness, making it rather more suited to shooting at large apertures than most of its peers. I