2013
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DSC LABS
WHY SHOULD I USE A DSCLABS CHART? DSC charts are used to establish and
maintain a standard for the quality and ‘look’ of images produced by a video camera. Adjusting
camera settings by using a chart before shooting video ensures the most accurate colour
reproduction possible. As well, shooting a few seconds of the chart to capture the lighting used on
set for a shot will provide a reference for the post production process. Providing chart reference
images with every change of lighting or scene change allows the post production team to make quick corrections and preserve image consistency while
minimizing time and money spent in post production.
HOW DO I USE THE COLOURS ON A DSC CHART?
For optimum quality, it is always best to start with an accurate reproduction of the scene. Setting up a camera before a shoot involves aligning a camera’s
gamma and tracking, using the chart’s grayscale and a Waveform Monitor with a reference monitor. Next, set up the cameras’ matrix to position colour
signals in their respective Vectorscope boxes.
The narrow tolerances of DSC charts give users a higher level of confidence in knowing that placing colour signals in the vector boxes should result in
accurate colour reproduction. Making grading decisions with the naked eye is risky, requiring both a perfectly calibrated monitor and a keen eye. With a
DSC chart plus colour and waveform data to complement your Non-Linear Editor, you can make intelligent grading decisions, even on a laptop.
WHY SHOULD I WHITE BALANCE TO A DSC PATTERN, WHEN I HAVE ACCESS TO PRINTER PAPER, OR A
WHITE WALL? A common mistake is white balancing to a perceived white, rather than a true white. Few papers are truly neutral (typically blue or
yellowish). White balancing to these will induce an undesirable false tint to your images. DSC’s CamWhite is a spectrophotometrically neutral white chart.
While DSC’s White N’ Warm chart provides both a true white reference, along with DSC’s popular image warming chart on the other side.
ARE ALL GRAYSCALES THE SAME? Only DSC grayscales charts are neutral from white to black. Others scales are typically
14-35mV (2 to 5 IRE) yellow on the white chip, becoming more neutral towards black. Aligning with a yellow leaning chart will produce bluish,
cold-looking images.As well, some charts have high infra-red reflection in the black and darker chips, which can play havoc with grayscale and
colour reproduction in some cameras producing inferior images.
WHAT SIZE CHART SHOULD I BUY? Unless you are shooting in very large venues, select the largest chart you can comfortably carry around.
Ideally, place the chart where your subject will be. You should be able to zoom in without going to the far end of the zoom. Avoid using the
far end of the zoom, because that is not where lenses perform their best, and there will likely be a shift when you zoom back to your actual framing. As a
guide, the 24-inch wide chart, was designed to be used at a distance of ten feet.
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