Photron FASTCAM Nova, Руководство по оборудованию

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FASTCAM Nova
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2.2. Selecting Shutter Speed
The shutter speed (Exposure time) is independent of the frame rate, and it is possible to
control the exposure time in the frame using the electric shutter. By making an exposure that
is of a shorter period than the frame rate, high - speed objects can be shot without blur.
When the frame rate is lower than 1,000 fps, the shutter speed can be changed from
1/1,000 (1msec), and when the frame rate is 1,000 fps or higher, it can be changed from one
step shorter shutter speed than '1/frame' second to maximum 1/4,800,000 second (0.2usec)
(it depends on the setting).
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For more information of Shutter Speed, refer to “3.1.6. Shutter Speed List”, page 43.
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For low speed FPS operation at less than 1,000fps, we use a special high - speed sensor of
12,800fps at 1,024 x 1,024 resolution so you can't set shutter speed longer than 1/1,000
second. However, you can operate at 2fps to 1,000fps.
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For example, when working under 500fps, the available shutter speed varies from 1/1,000
to 1/4,032,000 second. When working under 2,000fps, a shutter speed varying from one
faster step than 1/2,000 second, 1/2,020 second, to 1/4,800,000 second can be obtained.
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By activating "Low Frame Rate Function" from PFV, it is possible to apply a shutter of less
than 1/1,000 seconds. However, with exposure shorter than 1/1,000 seconds, the image
quality will degrade significantly. For 2 to 30 fps, only 1/frame seconds can be set.