The lighting on an overcast day, even at midday, is ideal for natural and easy candid portraits. My daughter played in the snow, got her cheeks all rosy, and then stopped for a minute for me to grab a couple of shots. I stood back and zoomed in to 120mm to blur out the background and I had no worries about the “raccoon eyes” you might get midday on sunny days since the snow acted as a natural reflector and bounced light back into her beautiful face.