⚡ Are my articles too long? Click this button for a condensed version!The Kodak Duo Six-20 Series II is a 1937 medium-format folding camera designed by Dr. August Nagel, the German designer behind the later Kodak Retina, for Kodak's compact 620 roll film format. "Duo" referred to its half-frame 6cm … Continue reading Kodak Duo Six-20 Series II (1937)