Nikon PN-11 brand_Kodak the M65x1F-Pentax 645 adapter ring

the M65x1F-Pentax 645 adapter ring is designed to mount "Chinese focusing helicoids" on a Pentax 645

This hood is in excellent condition

optics have light dust and some edge-paint bubbling

As shown in the image

Nikon PN-11 brand_Kodak the M65x1F-Pentax 645 adapter ringThe Nikon PN 11 is a 52. 5mm extension tube originally designed to provide 1: 1 magnification on the 105mm f4 Micro Nikkor lens. That said, you can use it with any Nikon F lens for extra macro magnification. And unlike other Nikon tubes, the PN 11 has a rotating tripod mount for extra stability, which is extremely useful. In excellent condition, with original box.