Asahi S3 Extension Tube Set adapter The backpack straps can be

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

and the bottom tightening collar is missing its rubber grip

with an accurate shutter

Aftermarket wired remote release for Nikon 10-pin type connectors

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

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.