• Aperture - is a hole or an opening through which light travels

• Shutter - a photographic device that administers the exposure by limiting the time over which light is admitted.

• Exposure - the total amount of light allowed to fall on the sensor during the taking of a photograph.

• Depth of field - is the distance between the nearest and farthest objects in a scene that appear acceptably sharp in an image.

• F-stop - making the aperture size larger to allow more light through the lens.

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