This is a Nikon reflex 500mm lens. The overall condition is good, and the focusing ring is smooth. There is no dust inside the lens barrel or peeling of the reflective coating, but it is difficult to photograph the condition of the mirror (though I'm not very good at it), so I've provided sample photos taken with a Z5 mirrorless camera in photos 7, 8, 9, and 10. Please judge based on the photos and examples. I think the resolution is sufficient, as shown in photos 7 and 9. When there are objects that are blurred behind the focal plane, as in photos 8 and 10, the characteristic ring bokeh of reflex lenses appears. Filter work will be done later. A protective filter LC37C Φ39mm is attached. Reflex lenses are fixed at F8 and are dark, requiring a tripod, and many people may have hesitated to buy them because of how difficult they are to use. However, with the advent of mirrorless cameras with high sensitivity, focus assist, and in-body VR, they have become much easier to use. The examples are taken with a Z5, FTZ2, and monopod combination. Before using the Z5, I tried it once with an F3 and was frustrated, and then I kept it stored away for a long time. Please try a reflex lens, which, in principle, has no chromatic aberration. Focal length...201-500mm Open F value...5.7~ Protective filter LC37C Φ39mm included Other features...Lens hood included, front lens cap included, rear lens cap included Other features...Front lens cap included, rear lens cap included