EF 24/1.5L II and astrophotography

[epsiloneri]

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.

 

[Schruminator]

If you check out the link below, you can see that the author has a similar experience with the 24 II and photographing stars-- and there are some samples posted as well.

http://intothenightphoto.blogspot.co.uk/2013/02/overcoming-coma-aberration-part-2.html

There's also a thread on dpreview discussing the same issue with a couple of photos posted as well.
http://www.dpreview.com/forums/thread/3391473?page=2

So, while I don't know exactly how your picture looks full sized, it looks like your experience is similar to most with this lens.

 

[epsiloneri]

Thanks! Indeed, my lens copy doesn't seem worse than anyone else's with regard to coma, and the Samyang 24/1.4 appears to be the significantly better option for stellar landscapes.