Well i made it to Antarctica and am posting this thread as i look out my window over newcomeb bay and think of the time that will come when the darkness will be upon us and the aurora will be in the sky and wonder will a Canon 17-40mm f4 be good enough for night photography? Is f4 ok for night photography or should i be looking at something in the f2.8 realm? the 16-35 looks like an awesome lens and am yet to read a bad review but $1700 for a lens i will not use that much seems a bit steep where as the 17-40 is almost $1000 cheaper, is 1.2 stops worth 1k more?
I already own the kit 24-105 f4 and a 8-15mm fish-eye at f4 and so far i love both lenses that said it is daylight 24hrs a day hear at the moment so its not like i can go outside and take a few star shots and decide if what i have is good enough.
what recommendations can be made in the way of a good wide lens for night shooting?