Tektronix Series 125 f1.9 lens in No.3 shutter vii though the box has seen

though the box has seen better days

but nice to have in any situation

with some cardboard wear and an inscription inside

Be aware that this head weighs nearly 2kg by itself

but the F-1 will work with any FD mount lens

Tektronix Series 125 f1.9 lens in No.3 shutter vii though the box has seenThe Tektronix Series 125 f1. 9 is a lens originally designed for photographing oscilloscope screens, so it's not exactly well adapted for life outside the lab: it's kind of bulky, has threads all over the place, and would take a bit of doing to mount it to a board (there's no retaining ring). Focal length is probably around 75mm, though it's hard to find specs for these sorts of things; coverage is at least "full frame", though it'll likely cover