Nikon Nikon macro ring set. Nikon Simply put, they're just tubes. There are no lenses or anything inside. Five rings: K1 to K5. From bottom left to bottom right: K1, K2, K3, top left is K4, and top right is K5. K1 has F-mounts on both ends and is 5.8mm long. K2 has a 52mm diameter female thread and an F-mount lens side, and is 5.0mm long. K3 has an F-mount body side and a 52mm diameter male thread, and is 5.8mm long. K4 has 52mm diameter male and female threads and is 10mm long. K4 has 52mm diameter male and female threads and is 20mm long. By combining them, various optical path lengths can be achieved. Stored in a dry cabinet. Please purchase only if you understand that this is a used item. Please check the other cameras on each listing screen. #Pasamai We carefully select only good quality items, but due to the nature of USED items, there may be some stains, damage, or odors, which may vary from person to person. Delicate individuals should refrain from bidding as it may cause trouble. Also, due to the nature of the product, returns are not accepted, so please bid only if you are accustomed to USED items. ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ #FilmCamera #Serviced #OperationConfirmed #FreeShipping #OldLens #Nikon #Canon #Pentax #Minolta #Konica #Olympus #Leica #Contax #Rollei #FujiFilm #Kodak #Pen #F #EOS #NIKON #Canon #PENTAX #MINOLTA #Konica #leica #CONTAX