Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. [tool and equipment components]
7. camera components
8. film holders (camera components)

Anotations

Scope note:

Devices in which rolls of photographic film wound on spools are secured and attached to a camera or other image-recording device to be exposed and advanced frame-by-frame. These normally include removable dark-slides to reveal the film before exposure, or to protect the film while removing the film holder from the camera.