What's inside of a camera?

Aperture- a hole or opening in the camera in which light travels.

Shutter- a device that allows to pass light for a determined period of time.

Exposure- is the total density of light allowed to fall on the photographic medium during the process of taking a photograph.

Depth of field- is the range of distance that appears acceptably sharp

F-stop-  the maximum aperture of the lens

Focal length- the measure of how strongly the system converges or diverges light.

Visible spectrum- is the portion of the electromagnetic spectrum that is visible to the human eye

Flash- a device in photography producing a flash of artificial light at a color temperature of about 5500K to help illuminate a scene

Single-lens reflex- is a camera that typically uses a semi-automatic moving mirror system that permits the photographer to see exactly what will be captured by the film or digital imaging system. 

Auto focus- optical system that uses a sensor or a control system and a motor to focus fully automatically or manually selected point or area. 

Wide-angle lens- refers to a lens with a focal point substantially shorter than the focal length of a normal lens for the image size produced by the camera.

Canon Rebel T3

 

Aperture/Exposure/Compensation trash button

Live view/Movie shooting

Quick control/Direct print button

Drive mode button 

White balance button

MENU button

AE lock/FE lock/Reduce zoom button

AF point selection/Magnify button

Speaker

Change screen/information display

Cross keys

Auto focus mode button

Memory and access lamp

Playback button