GloryStar MK-Z-AF1 Metal AF Macro Extension Tube Auto Focus Adapter ring 11mm 18mm for Nikon Z6 Z7 Z8 Z50Specifications Compatible Brand: NIKON Details Major function: Nikon's macro close up two ring is a combination of a 11mm and a 18mm single ring. The two rings can be used alone or in combination. After mounting, the lens's shortest focusing distance can be reduced to achieve local macro. effect. Feature: Metal Material Matte texture Simple disassembly Small and exquisite