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slide projector 
Device with a lamp and an optical system that projects an enlarged image of a slide on a screen.
autofocus on-off switch
Device that starts and stops the mechanism automatically controlling the sharpness of the image.
manual focusing knob
Knob for manually adjusting the sharpness of the image projected on the screen.
objective lens
System made up of a series of optical devices fixed on a mount and used to project an enlarged image of the slide on a screen.
storage compartment
Compartment used for storing various items, including the power cord and the remote control.
slide tray
Container where slides are placed in order of projection.
remote control
Device manipulated from a distance that operates several of the slide projector’s functions such as forward and reverse slide changes.
power-off/slide-select bar
Button that causes the slide tray to advance manually so that a specific slide can be selected.
reverse slide change
Button that causes the previous slide to be projected on the screen.
forward slide change
Button that causes the next slide to be projected on the screen.
on-off switch
Button for turning the device on or off.
slide
Positive photographic picture (with the same brightness as the original) that is mounted on a transparent backing and usually projected on a screen.
lock ring
Part that holds the slides in place in the slide tray.
