This photo was taken with my Rollei SL66 and 80 mm lens. While I almost never take hand-held shots, this was one. I had just taken another photo and saw this scene. I knew it was going to be fleeting, so I read the shadow density with the spot meter, focused, flipped up the mirror, and viewed through the sports finder. One handheld shot was all I managed before the effect disappeared. Fortunately, the big old SL66 is very stable with the mirror up.