Product picture - Nimar Extension Ring with Mechanical Zoom Control & Lock for Vario-Tessar T* FE 16-35mm f 4 ZA OSS Nimar, Extension, Ring, with, Mechanical, Zoom, Control, &, Lock, Vario-Tessar, T*, FE, 16-35mm, f, 4, ZA, OSS Click the image to close this page