I took this shot of an arctic fox when it was minus 45 degrees Fahrenheit in northern Ontario, Canada. This is the coldest temperature in which I've photographed. My boots were rated for minus 40, and my toes were freezing. This experience made me decide to buy the most serious boots on the market at the time (mid-90's), so I bought boots rated for minus 100 F. My toes have never been cold since, although the boots are so large and heavy I feel like Godzilla walking around in them! I shot this with my Mamiya RZ 67, a medium format (6 x 7cm) film camera. I never used the in-camera reflected meter in the Mamiya, so I used a hand held Sekonic L-352 meter which produced a perfect exposure of a white on white subject. I never had to bracket because the meter was (and is) so accurate. The incident capability of the meter means it reads the light falling onto the scene, not the light reflected from the scene. This is the most accurate way to read light for exposure purposes. You don't even have to bracket. I used a 350mm Mamiya lens, and Fujichrome Provia 100 transparency film. My settings were unrecorded, but they were probably 1/400 and f/6. Regarding the cold, it does amaze me how animals like this can survive such frigid temperatures.