BCST 1120 Light, Colour, Camera & Lens

Colour Temperatures and White Balance

• 3200 K - Tungsten Light

• 4200 K - Fluorescent Bulbs

• 5600 K - Sunlight

Mixing Colours

Subtractive Colour Primaries

• CYAN, MAGENTA and YELLOW PIGMENTS combined in the right amount give you BLACK

Additive Colour Primaries

• RED and BLUE and GREEN LIGHT combined in the right amount give you WHITE.

Secondary Colours - Additive

• Mixing 2 Primaries gives complementary colour

• 3 complementaries:

  • yellow

  • cyan

  • magenta

• Mixing a Primary with its complementary colour gives white.

White Balance

• Electronic Compensation for Colour Temperature is called White Balance

• Needs to be changed depending on the lighting.

Filter Wheel

• Located where the lens joins the camera

• Used to Physically change the amount of lights on the sensor

• Neutral Density Filters

• Reduces all light wavelengths equally

Filter Presets - PXW ZI90

• Filter 1 - Clear

• Filter 2 - ¼ ND

• Filter 3 - 1/16 ND

• Filter 4 - 1/64 ND

Colour Bars

• Generated electronically by the camera rather than optically

• Can be used to diagnose camera and signal issues

Zoom Lens

Lens Ring

• Outside toward camera

  • Focus Ring

    • generally the front ring on most lenses

  • Zoom Ring

    • adjusts the size of the frame/ viewing angle by altering the focal length

  • Iris/ Aperture Ring

    • controls the amount of light reaching the sensor

    • the smaller the opening the larger the f-stop number

  • Back Focus/ Macro Ring

    • Macro allows you to focus on objects very close to camera lens

Setting Focus

• Zoom all the way in on subjects eyes

• Adjust focus so that the image is sharp

• Zoom out to set frame size

Bokeh/ DOF

• Sharp objects, Soft background

• Creates Depth in Frame

• Separates subjects from BG

How to Create Depth

• Use a larger sensor inside the camera

• Shoot on a long focal length

• Shoot with an aperture value as low as possible.