This is a vintage Panasonic PK-L078 Lens Converter Kit from Japan. It is a teleconverter type lens with a fixed/prime focus type and a focal length that is also fixed/prime. The lens is compatible with many other cameras besides Panasonic and has a compatible lens front and filter size of 49mm. The kit includes an adaptor and caps, and it is suitable for those who are interested in vintage camera equipment.