An old great lens with excellent soft-out focus backgrounding ("bokeh") for very cheap price, this a shame. People not respect this excellent lens.
I read somewhere in forum, this lens is a dog, this lens has not enough details blah,blah and on other forum this is great product etc. So I decide I will buy one and let see with my eyes what is the truth. I don't know how say this a dog. I say this lens is great, bokeh one of the best what I ever seen, don't forget I have large collection on old manual focus lenses /Pentacon,Meyer,Carl Zeiss Jena see in the gallery/.Very sharp lens same sharp as other Nikkors or Carl Zeiss Jena best ones. Color rendering is not the best , but I guess not worst than Nikon D50 kit lens.Before I took this test photos /see in the gallery/ I forgot to clean back lens from dust, perhaps result would be better with clean lens. I really satisfied with the performance of Nikkor-Q 200mm f/4, it was easy to set right focus, not heavy at all. I found only one weekness, you can't set aperture on mounted lens, just if dismount from camera body. This feature comes from NIKON design, non AI lens aperture collar not works on NIKON DSLR.If you would change this, send to a camera shop , they should convert to AI and apperture settings will works fine.
(by Jamie W. Photo.net Nikon Forum)