Pk645 Pentax 645 mount lens to E mount adapter ring for sony a5100 a6000 a6300 a6500 NEX3/5N/7/6/5R/5T a7 a9 a7r a7s a7r3 camera Pk645 Pentax 645 mount lens to E mount adapter ring for sony a5100 a6000 a6300 a6500 NEX3/5N/7/6/5R/5T a7 a9 a7r a7s a7r3 camera. Sale price : $47.50 Category : Consumer Electronics