single-lens reflex (SLR) camera: camera back![click to hear](/images/speaker.jpg)
film cartridge chamber ![click to hear](/images/speaker.jpg)
Compartment that holds a film cartridge.
film guide roller ![click to hear](/images/speaker.jpg)
Rotating cylinder that directs the film from the cartridge toward the film guide rails.
film guide rail ![click to hear](/images/speaker.jpg)
Each of the flat metal rails on both sides of the focal plane shutter; the taut film travels along them.
film leader indicator ![click to hear](/images/speaker.jpg)
Indicator showing whether the film leader (end of the film extending outside the cartridge) is properly inserted into the take-up spool.
pressure plate ![click to hear](/images/speaker.jpg)
Spring plate that keeps the film flat as it passes behind the lens.
film sprocket ![click to hear](/images/speaker.jpg)
Small serrated wheel that guides the film toward the take-up spool.
neckstrap eyelet ![click to hear](/images/speaker.jpg)
Small ring that holds a strap to help carry the camera.
take-up spool ![click to hear](/images/speaker.jpg)
Cylinder for winding the exposed film.
focal plane shutter ![click to hear](/images/speaker.jpg)
Opaque device that opens for a predetermined length of time based on the shutter speed chosen; it allows light to come in contact with the film.
viewfinder ![click to hear](/images/speaker.jpg)
Device for viewing the scene to be photographed, framing it and adjusting its clarity.
film rewind system ![click to hear](/images/speaker.jpg)
Manual or motorized device that winds a partially or totally exposed film back into its cartridge.