Once upon a time, I had the 28mm f/2.8. It was a lovely lens. Would probably have been better on the fulll frame. Never had the chance to try it out.
I've done 10-minute exposures with the 5D Mark II at ISO-1600 pointed at Eta Carinae, and, it was clean, clean, clean.
I see no problem with doing short exposures at ISO-3200 -- look at Phil Hart's work or Alex's using his D700.
H
|