Asahi S3 Extension Tube Set adapter The backpack straps can be

The backpack straps can be removed and stored in a back chamber

is a telephoto zoom lens for Micro Four Thirds that provides a whole lot of magnification- the full-frame equivalent of 600mm- in a lens that's only 14cm long

5 lens for Leica thread mount is a Soviet-made collapsible 50mm lens

Less repeatable but more convenient than a "hard" extension tube set

and the bottom tightening collar is missing its rubber grip

Asahi S3 Extension Tube Set adapter The backpack straps can beThe Asahi S3 extension tube set includes three M42 thread mount extension tubes: roughly 9mm, 19mm, and 29mm, for a total of about 57mm extension when combined. These are manual tubes: there is no stop down mechanism built in. In decent cosmetic condition, with paint and finish wear.