Panasonic Lumix G X Vario PZ 45-175mm f4-5.6 ASPH Power O.I.S. brand_Gralab but if you want a

but if you want a classic fast 50 in pretty solid shape

Toyo-View Graphic Lens Board Adapter

Nikon Nikkor-Q 135mm f/4 short mount lens for Nikon S mount

so tracking is off the table)

all-metal lens for the M42 screw mount (except the see-through part

Panasonic Lumix G X Vario PZ 45-175mm f4-5.6 ASPH Power O.I.S. brand_Gralab but if you want aPanasonic sure likes long lens names, but here you go: this is a Panasonic Lumix G X Vario PZ 45 175mm f4 5. 6 ASPH Power O. I. S. in excellent condition, with clean glass and good function. A compact telephoto zoom lens for Micro Four Thirds with power zoom, ideal for video use. Includes original box and pouch.