I'm going to be holidaying in Fairbanks, Alaska in September 2008, and will of course be taking up the opportunity to get a few hundred shots of the Aurora Borealis.
Now here is my problem, I am new to DSLR photography and have only had my camera a few weeks and as yet have not been able to get out to practice some "Night shots" due to really bad weather (Torrential Rain). I have no idea were to begin in regards to what lens I should use. As I'm going from the Tropics to such a cold place, will I need to buy a different lens to the ones I already have to suit the aperture/shutter speed for this type of shot in this type of weather, or will one of my current lenses suit.
I currently have a Sony alpha700 with a sony18-70mm/f3.5-5.6,
Sony18-200m /f3.5-6.3,Sony75-300mm/f4.5-5.6, & Sigma wide angle 10-20mm/f1.4-5.6
All help and info will be greatly appreciated.