I know from experience that the point-spread function of the EF 24/1.4L II wide open is very poor, and thus not ideal for astrophotography (the stars look funny, in particular in the corners of the frame). Since fast wide lenses are perfect for capturing meteors, I used it anyway last night and managed to get a beautiful Perseid. The stars, however, look pretty terrible. I always thought it was the lens that was constructed that way, for daytime photography and non-point sources it is fine, but now I start to wonder whether I perhaps have an unusually poor copy. Does anyone have experience with the EF 24/1.4L II for astrophotography, and are your results (for the non-round shapes of stars) as bad?
The image below is approximately 1/4 of the 5D3 field, the lower left corner. The faint streak to the right is a satellite. The imaged has been scaled. ISO 1600, 15s, F1.4, non-guided.