Leica E49 to E67 Step-Up Ring Adapter for Universal Polarizing Filter - Compatible with M Mount Lenses for Enhanced Photography & Videography

This Leica filter adapter is a 49mm to 67mm step-up ring that makes it possible to mount Leica E67 filters on lenses with 49mm threads. Since this adapter ring features a hollowed out core, viewing through the rangefinder is still possible.  Using the adapter allows for polarizing effect to be judged directly through the viewfinder.