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

There really isn't any bad news

and cables are not included

Suitable for a small DSLR or mirrorless system

Sharp and fine-grained (for this speed

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.