ALPA multi-use adapter, 51mm, with ALPA Accessory Interface and 3/8“ tripod thread.
The adapter 51mm provides a stable, torsion-resistant extension for macro applications. As a complement to a 17mm and a 34mm adapter, it can also be used in mixed operation without any problems. It has an ALPA accessory interface with 3/8″ thread for tripod mounting. This adapter was also developed as a complement for the new ALPA HR Alpagon 138mm lens.