Blackmagicdesign URSA Mini - Page 76

Shutter
The ‘Shutter’ indicator displays your shutter angle or shutter speed. By tapping this indicator,
you can manually change your URSA Mini’s shutter values or configure shutter priority auto
exposure modes. On URSA Mini 4.6K and URSA Mini Pro 4.6K, the shutter measurement setting
can be used to select whether to display shutter information as 'shutter angle' or 'shutter
speed'. See the ‘setup settings’ section in this manual for more information.
Your URSA Mini's shutter indicator. Tap this to access shutter settings
Shutter angle or shutter speed defines the level of motion blur in your video, and can be used
to compensate for varying light conditions. 180 degrees is the optimum shutter angle for
capturing satisfying motion blur in most conditions, with the equivalent being a shutter speed of
1/50th of a second. However as lighting conditions change, or the amount of movement in your
scene increases, you may decide to adjust accordingly.
For example, 360 degrees is considered ‘wide open’ and allows maximum light onto the sensor.
This is useful for low light conditions with subtle movement in your scene. Alternatively,
ifshooting subjects with a lot of movement, a narrow shutter angle like 90degrees will provide
minimal motion blur for sharper, crisper images. The equivalent shutter speeds compared to
shutter angle depends on the frame rate you are using. For example, if you are shooting at
25frames per second, then 360 degrees will equate to 1/25th, and 90 degrees will equate to
1/100th of a second.
Tapping the ‘shutter’ indicator brings up the suggested shutter values along the bottom of your
URSAMini’s touch screen. If you have auto exposure set to ‘off,’ this screen will show you your
currently selected shutter value, as well as the available flicker free shutter values, based on
the mains power frequency you have selected in your URSA Mini’s 'setup' menu. For more
information, see the 'setup settings' section in this manual.
To select one of the flicker free shutter values, simply tap on one of the displayed shutter
values. Tap the arrows on either side of the current shutter value indicator to cycle through
some of the most commonly used values.
NOTE When shooting under lights, your shutter can affect the visibility of flicker. Your
URSA Mini will automatically calculate a flicker free shutter value for your current frame
rate. It will display up to three suggested flicker free shutter options at the bottom of the
heads up display when adjusting your shutter. These shutter values are affected by
mains power frequency in your region. You can set your local power frequency to
50Hzor60Hz in your URSA Mini’s setup menu. See the ‘setup settings’ section in
thismanual for more information.
NOTE The characteristics of individual light sources may still cause flicker even when
using flicker free values. We recommend always performing a test shoot when not
using continuous lights.
78Touchscreen Controls