Konica K/AR mount RMC Tokina 80-200mm f/4 telephoto lens

This is a vintage Tokina RMC 80-200mm f/4 manual focus telephoto zoom lens. It features Tokina's "Rainbow Multi-Coating" (RMC) for improved light transmission and reduced flare. The lens has a constant maximum aperture of f/4 and a 55mm filter diameter. Has some lens separation (as seen in last picture) but as the center has not been affected, it is not affecting the picture quality enough to notice. Focus is smooth, aperture works fine for all stops and EE.