Bellows for Canon EF (Manual)
The Canon Macro Bellow is an accordion-type section, which is inserted between the lens and the camera body and extends the lens-to-film distance thus improving the quality of macro photography.
By moving the lens further away from the body it reduces the focal distance and increases magnification. The Canon macro bellow unit is far more convenient than to keep staging multiple extension tubes, as it requires less fiddling and changing. This bellow has a manual connection meaning there is no electrical contacts, so focusing and exposure need to be adjusted manually.