This adapter converts Leica L39 mount lenses (with 50/75mm bright frames) to Leica M mount. It has a cutout at the bottom, allowing it to be used with lenses that have an infinity lock, such as the Elmar. It shows some signs of use, but there are no functional issues. Manufacturer: K&F Concept Model Number: KF-LM-5075 [Shipping] Ships via Click Post. *If paying via "convenience store payment" or "bank transfer," please purchase only if you can pay within 24 hours.