Photron FASTCAM Mini AX Series, Hardware Manual

Page: 41 / 74

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2.2
Selec
ting
Shut
ter
S
pe
ed
FASTCAM Mini AX
27
FASTCA
M Mini
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 photographed blur-free.
The longest setting values of the shutter speed are as following:
- Frame rate is lower than 1,000 fps: 1/1,000 sec (1 msec)
- Frame rate is 1,000 fps or higher: one step shorter shutter speed setting than '1/frame' second.
(Please refer to the following Supplement part for the example)
The shortest setting value of shutter speed is 1/3,811,764 sec (approx 0.26usec) (type 200K and type
540K is 1/950,000sec(1.05 usec)) .
With the export-controlled models, such as Types 200K and 540K, there is a certain constraint on the
available framing rates.
For example, when working under 500fps, the available shutter speed varies from 1/1,000 to 1/3,811,764
second.
When working under 2,000fps, a shutter speed varying from one faster step than 1/2,000 second, 1/3,000
second, to 1/3,811,764 second can be obtained.
•
Please refer to “4.3 Setting Shooting Conditions” of “Photron FASTCAM Viewer User’s Manual” for
the details of the setup.
•
For more information of Shutter Speed, refer to “3.1.10 Shutter Speed List” , page 40.