Leica Adapter E49 to E67 for Universal Polarizing Filter M
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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.