Peace be upon you, for sale is a very rare original piece from the Japanese company Nikon. • Its function: It attaches behind Nikon lenses (F-Mount) and directly converts the lens into a manual scope/telescope for viewing distant objects with the naked eye without a camera. • Accessories: Original Nikon BF-1 rear protective cap. • Condition: Clean and 100% original. • Location: (Mecca) .