VS 18 Ross Homocentric lens in Conpur shutter. F:6 1/2" lens with iris diaphragm f6.3-22 in Conpur shutter 1/2/5/10/25/50/100/200/T/B. Three bladed; DRP No.258646 DRGM. Cable release socket. Lens No.88128 Ross Homocentric Lens in Compur Shutter