Nikon TC-17EII brand_Energizer 8 Schneider Xenar lens in

8 Schneider Xenar lens in a Synchro-Compur shutter with shutter speeds from 1s to 1/500s (plus Bulb)

And it has a built-in 45mm f2

The Sinar Sinaron S 210mm f5

it’s because Nikon later bought this design and called it the Nikonos

It incorporates Nikon’s quick AF-S focusing system and new E-series electromagnetic diaphragm

Nikon TC-17EII brand_Energizer 8 Schneider Xenar lens inThe Nikon TC 17EII is an autofocus teleconverter designed for select Nikon AF S telephoto lenses (here's Nikon's compatibility list). In good cosmetic condition, with minor paint and finish wear. Good optics and function. Includes rear cap, but not the taller front cap (we provide a standard Nikon body cap)