APERTURE- The variable opening produced by the iris-diaphragm through which light passes through to the film.
CLOSE-UPS- The general name for photographs taken from a really short distance.
DEPTH OF FIELD- The range of acceptably sharp focus in front of and behind the distance the lens is focused on.
DIAPHRAGM- A couple of metal 'blades' that can be changed to form a large or small opening through which the light is let through.
EXPOSURE- This is when the light hits the film. The length of time that this occurs can be changed in the settings.
FISH-EYE- This is a type of lens that is wider than most other lenses and produces a distortion effect.
FLARE- This is when there is image degradation caused by light that isn't focused to form the primary image.
FOCAL LENGTH- The distance between the centre of the lens and its focus/subject.
ISO NUMBER- This is the International Standards Organisation. The number represents the film's sensitivity to light.
RESOLUTION- This refers to how sharp a digital image appears. The higher the resolution, the more pixels are present in the image.
SHUTTER SPEED- This determines how long the shutter is open when taking the photograph.
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