I recently acquired a Kenko Pinhole Lens 02. It came with an adapter to mount on my D80. How can I get the shutter to fire? Any mode I try all I get in the viewfinder is blinking lights. It will fire in Manual, but there would be no meter reading. I also use Canon gear, and to use non Canon lenses all I need to do is select Aperture priority and the camera will select the shutter speed. Apparently this does nor work with Nikon. I do have the D80 manual, but don't know where to look re shooting with a non Nikon lens. Can anyone give me a suggestion please? Thanks!