OK , this was taken in a snow cave with my S70 2 years ago but in August I am going to climb this same mountain [ Ruapehu New Zealand ] , there will be a ski competition where competitors have to climb three stages and ski back down . There will be other photography outfits there but i want to climb to the highest point nd get some decent shots of the competitors as they reach the top . It will be held regardless of weather . Now: I have the gear to protect myself I'm just not sure about the D50 and D80 . I bought a waterproof "sheath" for the 70-200 lens but was wondering if I shouldn't just take the D50 and 70-300G lens to be safe . I expect temperatures around -10 to +10 degress celcius . I can do something to protect them from water I'm just wondering about cold , what they can handle ?