Function: Made of high quality aluminum alloy, sturdy and durable, wear-resistant and long life. It can focus infinitely. Delicate design and excellent workmanship. Full manual operation, manual focus, and manual exposure. The adapter does not have electronic contacts, so autofocus is not supported. Easy to install, remove and operate lens PK Lens Adapter for NEX Camera Body Specifications: Brand: FOTGA Condition: 100% Brand New Material: Aluminum Alloy Color: Black Suitable for Lens : PK Lens For NEX Camera Body Package List: 1 x Adapter