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Note: If operating in Relative or Syncro modes, the shutter speed is reported in yellow text.
Note: If the operator requests a shutter speed (angle) that is outside the capability of the
camera in that mode, the actual shutter speed (angle) used will be reported in red text.
Shutter Speed
When operating in Normal mode, the Shutter Speed value used by the camera is fixed, i.e. it
is independent of the image capture rate. This is opposite from a mechanically shutter camera.
Decreasing Shutter Speed will more light falls on the sensor, increasing exposure and motion
blur on any objects moving within the frame. As Shutter Speed increases less light falls on the
sensor, decreasing exposure and motion blur on objects moving within the frame.
Speed: Exposure times presets include: 1/24, 1/25, 1/30, 1/32, 1/33, 1/40, 1/48, 1/50, 1/60,
1/96, 1/100, 1/120, 1/125, 1/192, 1/200, 1/250, 1/384, 1/400, 1/500, 1/696, 1/800, 1/1,000,
1/1,200, 1/2,000
th
sec.
When operating at 23.98 or 24.00fps, these equal common shutter angles of
1/32nd
1/48
1/60
Relative: When operating in this mode, the Shutter Speed values are proportionately reduced
or extended to correspond to changes in the instantaneous capture frame rate.
This mode is analogous to use of a fixed shutter angle on a mechanically shuttered camera.
E.g. Enabling Relative mode with 1/48
th
1/16
sec for 8fps. This achieves the same visual result as setting a180 degree shutter.
Nov 27 2008
270 deg
180
144
th
sec shutter at 24fps will mean 1/96
Copyright RED Digital Cinema
1/96
1/192
1/384
th
sec for 48fps, and
90
45
22.5
25
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