Taquamenon Falls in winter

This is Taquamenon Falls in the Upper Peninsula of Michigan. The yellow color in the water comes from tannic acid produced by decaying leaves upstream. It looks like pollution, but it's entirely natural. It was zero degrees Fahrenheit this day, but I had just come from northern Ontario, Canada, where it was minus 57 F (with no wind chill factor). By comparison, zero degrees felt like I was in Florida but without the palm trees. In fact, I unzipped my parka because I felt too hot! This is a 2-second exposure, and to make sure the foreground tree was as sharp as the waterfall, I used f/32 (I hate out of focus foregrounds). I shot this with the same medium format camera as I discussed yesterday, the Mamiya 7, and with the same transparency film -- Fujichrome Velvia 50. All of my exposures back then were determined by a handheld meter used on 'incident' mode which read the light falling on the scene as opposed to light reflecting off the elements in the scene. Incident readings are more accurate which is why I relied on them all the time. With film, of course, you never knew if your exposures were correct until you saw it developed.