Photron Fastcam SA2, Hardware Manual

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Chapter. 3 Recording
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3.6. LOW LIGHT Mode
The more you increase the frame rate or shutter speed of the camera, the less light enters the
camera making the displayed image darker. Low light mode is a function that temporarily increases
the exposure time, making the displayed image easier to see to enable you to focus and setup the
camera.
Putting the camera in to the RECORD mode will immediately return the camera to the original frame
rate and shutter settings selected.
3.7. VARIABLE Setting
In the recording conditions settings, the frame rate and resolution can be set to the desired value
following the conditions listed below.

FRAMERATE can be set from 75frame rates between 60 fps (50fps for PAL) and 86,400 fps.

The size and horizontal position of the resolution can be set in 256 (horizontal) and 32(vertical)
increments.

The recording time when the horizontal resolution is set to 1,920is the same as when the horizontal
resolution is 2,048.
Example: The recording time is the same for 2,048 x 1,536 pixels resolution and 1,920 x 1,536
pixels resolution.