I have a lightly used Schneider Kreuznach Componar 105mm/f4.5 enlarging lens (for 6x9 cm) with mounting flange, in the original box. This is the original Schneider line of enlarging lenses, introduced in 1914. Optical designs are 3 elements in 3 groups. f-stops run from 4.5 to 16. Asking $50, S/H included.