I compose this shot of cattails along the Pentwater River with my largest telephoto lens. On my Nikon D7000 camera body, which does not have a full-frame sensor, my 500-millimeter lens is making an image that is the equivalent of 750 millimeters or a 15-power scope. The resulting compression and shallow depth of field or focus helps me make a dreamy-looking image that emphasizes the fuzziness and large amount of cattails. F5.6 at 1/1000, ISO 800, 500mm lens at 500mm