Winter photography can be very rewarding. Images of subjects blanketed in snow, skeletal deciduous trees with eerie shapes and form, clouds of exhaled carbon dioxide implying frigid temperatures and locations with no crowds all await the eager image maker. Early-morning and late-evening sun that glistens off newly formed ice crystals shines like diamonds in the snow. No crowds means you have the place all to yourself. Sounds perfect, so grab your gear and get outside. But before you venture off to capture these winter opportunities, there are some precautions and technical considerations to consider. Layer Up My first layer is a pair of fleece or polypropylene long johns. If I begin to sweat, these materials wick the moisture away from my...