Mamiya Auto-Ext Ring No.2 lens mount_C Mount well made ball head with

well made ball head with a unique 45-degree clamp which provides extra range of motion at the "front"- ideal for macro use

though it's obviously seen things in the last several decades

Minor wear to battery contact that doesn't impact function

A built in close-up filter lets you get as close as 2 feet from your subject

Compatibility is limited however: Nikon recommends the TC-16A only with the F-501/N2020

Mamiya Auto-Ext Ring No.2 lens mount_C Mount well made ball head withThe Mamiya Auto Ext Ring No. 2 is a 25mm extension tube for Mamiya 645 cameras and lenses. It provides extra macro capability without any loss of image quality (not because it's extra fancy, just because it's a tube full of air).