The Nikon 50mm f/1.4 AF-S G, when tested, actually showed a definite step between f/1.4 and one-third of a stop down, f/1.6. The cleaned up the image in a big way. But here it is shown at full bore.
Nikon D3X
,Nikon 50mm f/1.4 AF-S G 1/60s f/1.4 at 50.0mm iso100
full exif