Nippon Kogaku 600mm f9 APO-Nikkor in 5.5" Sinar board

The Nippon Kogaku 600mm f9 APO-Nikkor is a barrel lens (without shutter) that covers up to 11x14". In excellent condition, with minor internal dust and light cosmetic wear. Diaphragm blades are even, though a few have light oil which does not affect function. The flip-away lens cap holds well, though only one spring clip is present. The lens is threaded into a custom 5.5" Sinar-compatible board.