GoPro HERO CPPM1 Manual page 39

Protune
SHUTTER
The Protune Shutter setting determines how long the shutter stays open.
Scroll between the options to see a live preview of each setting,
and then tap the one you want. The default setting is Auto.
The options depend on the fps setting, as shown below.
Example 1:
Shutter
1080p30
Auto Auto
1/fps 1/30 sec
1/(2xfps) 1/60 sec
1/(4xfps) 1/120 sec
1/(8xfps) 1/240 sec
1/(16xfps) 1/480 sec
PRO TIP: To reduce the amount of blur when using the Shutter setting,
mount your camera on a tripod or other stable surface where it won't
wobble or shake.
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Example 2:
1080p60
Auto
1/60 sec
1/120 sec
1/240 sec
1/480 sec
1/960 sec
Protune
EXPOSURE VALUE COMPENSATION (EV COMP)
Exposure Value Compensation affects the brightness of your videos.
Adjusting this setting can improve image quality when shooting scenes
with sharply contrasting lighting conditions.
Options for this setting range from -2.0 to +2.0. The default setting is 0.0.
Scroll between the options on the right side of the EV Comp screen
to see a live preview of each setting, and then tap the one you want.
Higher values result in brighter images.
Heads Up: For Video, this setting is available only if Shutter is set
to Auto.
PRO TIP: EV Comp adjusts brightness within the existing ISO setting.
If brightness has already reached the ISO setting in a low-light
environment, increasing the EV Comp does not have any effect.
To continue increasing the brightness, select a higher ISO value.
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