Communications Technology TGJ4M. Incident light is light that strikes on the surface of a subject ...
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Transcript of Communications Technology TGJ4M. Incident light is light that strikes on the surface of a subject ...
LIGHTINGCommunications Technology
TGJ4M
TYPES OF LIGHT Incident light is light that strikes on the
surface of a subject Reflected light is light bouncing off of a
subject
LIGHT QUALITY Hard and soft How can we produce light that is hard,
direct, or spotted? How can we produce light that is soft,
diffused, or flooded?
UNDERSTANDING LIGHT
BASIC CHARACTERISTICS OF LIGHT Quality (coherence) Colour Temperature Intensity
QUALITY OF LIGHT Hardness or softness of light
Soft light Hard light
HARD LIGHT It gives the light a hard, crisp, sharply
defined appearance. The light from a clear, unfrosted
light bulb, a focused spotlight, or the noonday sun in a clear sky, all represent hard light sources.
It casts a shadow.
SOFT LIGHT Soft (diffused) light has the opposite
effect. Soft light tends to hide surface
irregularities and detail.
SOFT LIGHT Diffusers are used over the front of
lights to soften and diffuse their beams.
SOFT LIGHT Videographers (cinematographers) often
rely on umbrella reflectors or soft box to create a soft lighting effect.
COLOUR TEMPERATURE Light is produced by many different
sources: the sunan incandescent light bulba fluorescent light
Each of these can be distinguished in terms of colour temperature.
COLOUR TEMPERATURE Both sources of light (sunlight
on the right; a standard light bulb on the left) normally appear as white light to the eye.
Why does colour temperature matter?
WHITE BALANCE
Incorrect White Balance Correct White Balance
NIGHT VISION An effect on most cameras Allows you to videotape in the dark Image is monotone with green colouring
LIGHT INTENSITY Too much light results in an
overexposed image. Too little light results in an
underexposed image. Either of these is undesired and results
in missing details on the image.
LIGHT INTENSITY
LIGHT INTENSITY Light meters are used to measure light
intensity. A reflected light meter measures the
amount of light being reflected from (off of) subject matter.
An incident light meter can tell you how bright the light is that's falling on a scene.
LIGHT INTENSITY An incident light meter can tell you
how bright the light is that's falling on a scene.
How can you control light intensity?
EXTERNAL LIGHT Using external lights can be very
effective to light a scene Makes a perfect picture with vibrant
colours, no shadows and well defined edges
EXTERNAL LIGHTING AND EQUIPMENT Quartz lamps Fresnels Ceramic lamps LED (Light-emitting diode) lamps Scoops Ellipsoidal spot Camera Lights Barn doors Flags Filter Frames
THREE POINT LIGHTING Involves specific placement of 3 lights
around your scene These lights are called…
Key LightFill LightBack Light
THREE POINT LIGHTING
THREE POINT LIGHTING
KEY LIGHT The brightest, the most important lights
on the set. Pointed directly at the scene and on one
side of the subject
FILL LIGHT Less powerful than the Key Light Placed on opposite side of Key Light Fills in shadows to give scene a more
natural look
BACK LIGHT Placed behind the subject
and lights it from the rear. Adds depth to picture Provide definition and
subtle highlights around the subject's outlines.
Separate the subject from the background and provide a three-dimensional look.