Step-Down Ring Adapter from 55mm to 49mm for Tamron 90 mm 2.8 SP AF Di Macro 1:
Lens Diameter: 55 mm Filter diameter: 49 mm Material: metal Installation type: screw thread Colour: black Weight: 8 g Compatible with the following device models: Tamron 90 mm 2.8 SP AF Di Macro 1:1 Tamron .