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Vintage Canon Macro Auto Ring For Macro Bellows. Manual & Box. Unused.
The Canon Macro Auto Ring is a lens adapter designed to be used with the Canon Double
Cable Release for preserving automatic diaphragm coupling when non-automatic accessories
are inserted between a Canon single-reflex camera and an FD or FL lens. Attaching it to the
lens is especially useful in close-up photography and photo macrography for automatic
diaphragm coupling when using such accessories as a bellows or extension tubes which
do not have automatic aperture lever or when mounting the lens in reverse with a Macrophoto