Nikon Series E 100mm f2.8 tube with a serial number engraved

with a serial number engraved on the focusing track

This is the correct insert for this back

and 100-200mm f3

I think they mean digital mirrorless cameras

The Olympus Stylus Zoom 160 is a 35mm point-and-shoot camera with an impressively powerful 38-160mm zoom lens

Nikon Series E 100mm f2.8 tube with a serial number engravedThe Nikon Series E 100mm f2. 8 is from Nikons manual focus budget line, but its a really nice short telephoto regardless. Makes a great portrait lens, with good sharpness and a pleasant character. Its small, too: not much larger than a normal 50mm lens. In very good condition, with some cosmetic wear, light internal dust, slightly uneven focusing action.