Software reference (CDU) i--SPEED 2
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i--SPEED LT, i--SPEED 2
` Shutter Control
It is sometimes desirable to reduce the time during which the
sensor gathers light (called “exposure time”, “integration time” or
“shutter time”) in order to reduce motion blur and “freeze” the
motion in each frame. The default shutter time is equal to the frame
time, but this may be reduced by this control. The shutter time is
measured as the ratio between frame time and shutter time, e.g.
x10 means that the shutter is open for 1/10 of the frame period.
The shutter period may range from the frame period (x1) to 1/200 of
the frame period (x200), but is subject toa5microsecondlower
limitanda1secondupper limit.
The user should note that as the shutter ratio is increased, the
camera will require more light.
` Dynamic Range Control
The i-- SPEED 2’s image sensor is capable of detecting light in a
non --linear fashion, which permits each pixel to individually reduce
its sensitivity with increasing light. This effect allows the sensor to
“see” in very bright and dark areas simultaneously and this is
known as “dynamic range extension”. There are several levels of
dynamic range extension. Further discussion may be found in
Chapter 8 “Understanding the Olympus
i--SPEED 2”.
` White Bal Control
The Olympus i-- SPEED 2 provides two types of white balance,
pre--set and automatic. Several pre--set white balance settings are
provided, based on light source technologies found in the Olympus
range of industrial light sources.
The automatic function relies on the user placing a pure white
reference (sheet of paper etc.) if front of the camera, completely
filling the field of view and then pressing the WB Set button. This
paper must not be removed until the white balance is complete. An
on screen message shows the status of the white balance process.
The balance achieved is remembered by the camera while
switched off.
NOTE
This control is not available in monochrome cameras.
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