White Balance & Iso

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  • -AWB is generally a little off and only an approximation or guess by the camera.
  • White Balance & Iso

    1. 2. <ul><li>White balance (WB) : the process of removing unrealistic color casts, so that objects which appear white in person are rendered or translated to the white in your photo.  </li></ul>
    2. 3. <ul><ul><li>“ Cameras are getting smarter and smarter, why should I care about white balance?” </li></ul></ul><ul><ul><li>The best equipment is still effected. </li></ul></ul><ul><ul><li>Majority of digital images are JPEG’s </li></ul></ul><ul><ul><ul><li>Must get it right the first time </li></ul></ul></ul><ul><ul><ul><li>JPEG’s have less flexibility than RAW files </li></ul></ul></ul><ul><ul><li>Better image quality </li></ul></ul><ul><ul><li>Success in most lighting situations </li></ul></ul>
    3. 4. Automatic White Balance – the camera’s best guess. Daylight - bright, sunny days Shade – outdoor shade Cloudy – overcast, low contrast situations.
    4. 5. Flash – equivalent or interchangeable to daylight on most cameras Fluorescent Light – artificial indoor lighting. Energy saver bulbs, tubes, etc. Tungsten : artificial indoor lighting. Traditional light bulbs with tungsten filament.
    5. 8. Custom White Balance: calibrating the camera using a photo of the neutral white or light gray color of an object in a given situation. Kelvin (unit measurement for temperature) – uses a number or setting for a specific light source.
    6. 9. Color Temperature Light Source 1000-2000 K   Candlelight 2500-3500 K   Tungsten Bulb (household variety) 3000-4000 K   Sunrise/Sunset (clear sky) 4000-5000 K   Fluorescent Lamps 5000-5500 K   Electronic Flash 5000-6500 K   Daylight with Clear Sky (sun overhead) 6500-8000 K   Moderately Overcast Sky 9000-10000 K   Shade or Heavily Overcast Sky
    7. 10. <ul><li>ISO settings: the sensitivity of image sensor to the amount of light present. </li></ul><ul><ul><li>The higher the ISO, the more sensitive the image sensor. </li></ul></ul><ul><ul><li>So, with less light, the higher the ISO needs to be. </li></ul></ul>
    8. 11. The higher the ISO setting the more “noise” or grainy the image becomes.
    9. 12. <ul><li>ISO 80 - for taking photos in bright light; excellent for close-ups, landscape, and portraits. </li></ul><ul><li>ISO 100 - for extra sensitivity with little, if any, reduced image quality. </li></ul><ul><li>ISO 200 - cloudy and overcast days. Acceptable image quality, with some visible noise. </li></ul><ul><li>ISO 400 - suitable for indoor photography whether or not a flash is used. Useful for “stop-action” and sports photographs. </li></ul><ul><li>ISO 800, 1600 and above - useful for taking photos in very low light, or outside in good light when increased shutter speeds are required. </li></ul>

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