Brass Petzval Lens extension tube There really isn't any bad

There really isn't any bad news

but we're getting close with the Fujinon Super EBC XF 80mm f2

able to scan 120 film up 6x9cm

Otherwise: a solid example of this lens

One end loops around the tripod legs

Brass Petzval Lens extension tube There really isn't any badThis is an unmarked Petzval design brass lens for large format cameras. Likely from a projector there is no diaphragm or slot for Waterhouse stops it features rack and pinion focusing and pretty decently clean glass, free of fungus, with minor marks from cleaning over the last, like 100 years or more. Focal length and aperture are unknown. Includes a threaded flange for mounting to a lens board (not included). Will cover 4x5.