Quote:
Originally Posted by Paul Haese
Yes I understand this. Astrophotography is often a trade off between one thing or the other. Though I am not sure about whether a trade up to the mark II will help. The 14-24 Nikon N lens is reputed to be the best in this class and it still gets seagulls wide open. That is why I shoot at 3.5 or 4 just to prevent this from happening. Not having done a timelapse yet I will have to take your advice on being wide open.
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I exclusively use the 14-24 for time lapses and have to keep it wide open at f/2.8. Even then I have to keep the shutter open for 30 seconds (can get away with 15 especially when there is some moonlight). F/1.4 is a huge advantage shortening the required exposure four times, but there are trade-offs such as coma and vignetting (even most expensive f/1.4 lenses are f/2.0 in the corners)
The coma in 14-24 is more like a line of light rather than a seagull and does not look bad when downsized to 1920x1080 pixels. I found coma least pronounced at 14mm and most at 24mm.