EL-Nikkor 50mm f2.8 6-element enlarging lens with later style barrel design.
High quality 6-element Omicron-EL 50mm f2.8 enlarging lens
Premium quality 6-element APO-Rodagon enlarging lens for 35mm negatives from Rodenstock.
4-element Rodenstock Omegaron 50mm f/3.5 enlarging lens for 35mm format negatives
Rodagon 60mm f4.0 Enlarging Lens for 35mm Negatives from Rodenstock.