Photron FASTCAM SA-X2, Hardware Manual

Page: 42 / 74

FASTCAM SA-X2 42
2.1 Selecting Frame Rate / Resolution
2.1 Selecting Frame Rate / Resolution
Images can be recorded with the system from 60 (50 with PAL) fps to 12,500 fps using the full
1,024 x 1,024 pixels (1,048,576 pixels) resolution of the image sensor. For frame rates higher
than 12,500 fps, the high speed recordings are achieved by restricting the readout area of the
image sensor.
Restricting resolution enables higher speed recording. It also reduces data amount and then it
enables longer time shooting/recording.
2.1.1 Switching Frame Rate (13.5K mode Function)
This camera has two different frame rate setting modes, which can be switched from one to the
other as needed. The 13.5K mode is set ON by default. By setting it OFF, however, the system can
be operated with higher image quality.
The details of each mode are shown below:
■13.5K Mode ON (Note: Export-controlled models have a different maximum frame rate)
• The maximum frame rate is 216,000fps - 1,080,000fps (with image resolution of 128 x 8 pixels).
• When full frame: 12,500 fps max.
• The image resolution is slightly higher than that of the 13.5 K mode “OFF” at the same frame
rate.
■13.5K Mode OFF (Note: Export-controlled models have a different maximum frame rate)
• The maximum frame rate is 216,000fps - 324,000fps (with image resolution of 128 x 16 pixels).
• When full frame: 1,000fps max.
• The image resolution is slightly lower than that of the 13.5K mode “ON” at the same frame rate.
• The image quality of the 13.5K mode “OFF” can be higher than that of the 13.5K mode “ON” at
the same frame rate.
• The minimum frame rate in NTSC mode is 60 fps.
• The minimum frame rate in PAL mode is 50 fps.
• For the detailed setting, refer to "3.1.5 Frame Rate and Resolution", page 50.
The shading calibration has to be executed since there may be adverse effect to the image quality
(such as horizontal line-like noise) when the frame rate or shutter speed is changed.
Table of frame rates and image resolutions, refer to "3.1.5 Frame Rate and Resolution", page 50.