Excellent quality 6-element Omicron-EL 90mm lens, a standard focal length for 6x7cm negatives.
6-element Schneider Componon-S 100mm f5.6 enlarging lens for 6x7cm and 6x9cm format negatives
6-element Rodagon 105mm f5.6 enlarging lens for medium format negatives up to 6x9 cm.