Brass Petzval Lens extension tube Sharp and fine-grained (for this

Sharp and fine-grained (for this speed

Otherwise: a solid example of this lens

in excellent cosmetic condition

with magnification up to 1:1

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

Brass Petzval Lens extension tube Sharp and fine-grained (for thisThis 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.