Thank you for viewing. This is an adapter to convert M42 lenses to Leica M mount. Only 50mm lenses will have rangefinder coupling. - Brand: SHOTEN - Model: M42-LM R50 - Type: Mount Adapter - Included: Storage bag, case, rangefinder coupling adjustment tool Used a few times, there are minor scratches on the mount surface, but overall it is in good condition. Please note that returns and exchanges are not accepted for used items.