Tiffen Adapter ring B50 to 55mm Older Hasselblad C Planar 80 100 120 Sonnar 150
For all Hasselblad B50 Front Bay older C series lenses only as: Planar C 80mm, C 100mm, UV-Sonnar C 105mm, S-Planar C 120mm, C 135mm, Sonnar C 150mm, C 250mm, Zeiss 250mm Sonnar C Superachromat, Planar F 80mm.