Rexatar Zoom Lens 85-205mm
Does anyone know if this is compatible w/a Digital SLR Nikon d40 camera?
also, this one:
Asanuma Japan 400mm 5.6 Telephoto Lens
Are either of them compatible w/Nikon D40 or above SLR cameras?
Kiron Telephoto/Macro Lens?
There’s a bunch of these lenses, that I’ve never even heard of…sorry. ![]()
Unless the lens has its own motor, you’ll have no autofocus. And unless it’s a CPU lens, you’ll be unable to meter. Don’t put a crap lens on the D40. It’s too good of a camera for that. Stick to Nikon’s "G" series lenses.

No, it is not compatible. Perhaps in a nikon mount, but it is a manual focus lens, which will probably not meter with the D40.
References :