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I played with it last night as it was clear. I'll post some photos later.
I am not sure what wide open photos look processed but chromatic aberration was quite noticeable when zoomed in on bright stars on the camera LCD. Stopping down to F2 stopped that and star sizes reduced considerably as well.
Not sure about it being F1.8 though. I read that in a lens review as well. It was super bright at F1.4. I used a Nikon 50mm F1.8 just after it and it wasn't as bright at F1.8.
15 seconds F1.4 ISO 3200 or 6400 made sky blue/white like day and too bright. It might be useable at my dark site and with chromatic aberration corrections applied.
The Nikon 24mm F1.4 is regarded as one of Nikons sharpest lenses but I am not sure about the chromatic aberration at F1.4 which is where most lenses would probably fail for astro.
Lester how do you find your Canon 24 F1.4 for CA on bright stars? My Nikon 14-24 is very good wide open but thats F2.8.
At F2 though it seemed quite good.
Greg.
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