Magic Lantern / Camera adjustable Lens tube. Antique brass

A weighty ( 320g ) brass adjustable lens holder from either a Victorian plate camera or a magic lantern.

The back has a 62mm ( approx ) screw thread for mounting and a rack and pinion extension adjustor and knurled wheel . There is no lens , but the mount/tube would take a lens and holder of around 53mm external dia.

A really nice find for somebody with a bit of ingenuity and / or a good spares box .