This is a mount conversion adapter for attaching M42 mount lenses to Nikon F mount cameras. (M42 mount lens → Nikon F mount conversion) nikon F Mount ・Infinity focus not supported ・Only macro photography is possible ・Pin pressing is not supported. Please note that this product is a generic item and not a genuine manufacturer's product. We are not responsible for any problems that may occur to the lens or camera due to the use of this product, so please purchase it with the understanding that you are responsible for its suitability.