The ZEISS GumGum for ZEISS Lens Gears is designed to reduce the inner diameter of a ZEISS mini, small, medium, and large Lens gear when attaching the gear to ZEISS Otus, Milvus, and Loxia lenses. Each GumGum reduces the diameter of the gear by 2mm and protects the focus ring surface of your lens from scratches.

Each rubber covered band has adhesive on one side to aid in attaching it to the lens gear. The GumGum is removable and reusable and helps provide a snug fit.