The picture below illustrates the angle of view (click here for comparisons with the Nikon 50mm F1.4D):
Excellent image quality when stopped down just a little; Fast and accurate autofocus with full-time manual override; Generally attractive rendition of out-of-focus regions ('bokeh'; Resistant to flare; Low price
Slightly soft and low in contrast wide open; Lateral chromatic aberration somewhat higher than traditional 50mm 'standard' primes; Prone to purple fringing and bokeh chromatic aberration; most visible at large apertures