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Prescanning
e usual method of operating the Better Light
camera centers around the tasks of prescanning the
scene, adjusting parameters to achieve the intended
image, then scanning the final image. is method
allows for iteratively adjusting the composition, lighting
and exposure to give the photographer confidence that
the image on screen will be the same one captured in the final scan.
Making a Prescan
e digital camera has a significant advantage over film in that representative image data can be
viewed immediately after the exposure, allowing accurate and repeatable determination of exposure,
color balance, and tonal range. is enables the photographer to precisely adjust the exposure and
processing conditions for each image, and to neutralize any unwanted color cast, or to introduce color
filtration as desired.
In addition to evaluating the preview image visually, a digital spot meter permits the photogra
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pher to accurately measure any point location within the preview image, and a histogram display pro
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vides an overall indication of the distribution of image data values.
ere are two types of prescans available; the normal prescan and the fast prescan. Both types of
prescans can be initiated by clicking on the
button in the main control area.e camera will
then begin a prescan at the lowest resolution available for your model camera:
model 4000 series: 20% (1000 x 750 pixels, 4.2 MB)
model 6000 series and Super 6K™ series (1000 x 750 pixels, 4.2 MB)
Super 8K™ series (888 x 666 pixels, 3.4 MB)
To give the most accurate representation of the final scan image normal prescans are taken using
the currently selected Line Time, ISO, Color and Tone settings. e time necessary to complete the
prescan is displayed above the Prescan button.
Prescans of images to be captured without a tone curve (the “None 14-bit” tone curve
selection in the Tone panel) are captured and displayed using the previously selected tone
curve before switching to “None 14-bit”. is creates better image data and exposure rep
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resentations during the prescan and final scan preparation process. e final scan will be
made without a tone curve.
Prescan and Scan controls.