Upload & Sell: Off
Preaching to the choir, Rob ;-) I rarely use my Canon lenses (except the new 70-200 f2.8 IS mkII), because there are so many great alt lenses out there. However, for this type of photography, there are very specific challenges that need to be overcome that are uniquely different from a typical landscape shot.
The crux of this challenge is what is the best WA lens that can be used wide open or stopped down to f2.0 for point light sources? To date, the Distagon 21mm is best, but I really could use an extra stop, since ISO 3200 is the max I can get before serious degradation takes place in the 5D mkII, and 30 second expoures are max to avoid distracting star trails.