Star Trails with the Nikon 58mm f/1.4G
Added to my review of the Nikon AF-S 58mm f/1.4G in DAP are several star trail examples, including a comparison involving slightly different focus, which is particularly illuminating.
Star Trails with the Nikon 58mm f/1.4G
A discussion of the point spread function is also included, courtesy of a cooperative airplane blinking its red lights across the frame.