Fujinon Nano-GI XF 16-55mm f2.8 R LM WR brand_Balda which is to say that

which is to say that it's not just a terrestrial camera in a bulky housing

with plastic case and filter holder for use on enlargers that don't have a built-in filter tray

Image quality is excellent even wide open

May be connected directly to a camera's 1/8" miniplug input

so I'm not going to pack up to the library and write an optics dissertation

Fujinon Nano-GI XF 16-55mm f2.8 R LM WR brand_Balda which is to say thatThe Fujinon Nano GI XF 16 55mm f2. 8 R LM WR is a no compromises professional lens for Fuji X mount cameras, with a handy wide to portrait range and a fast f2. 8 constant aperture. Focusing is quick, and build quality is as solid as you'd expect. In excellent condition, with original hood.