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Manual
Set this switch to ‘manual’ or ‘m’ to disable servo control and adjust zoom using the
zoom ring on your lens barrel. In this mode, your lens will not accept zoom commands
from the handgrip, URSA Broadcast G2, or ATEM switchers.
Focus
Some B4 lenses also have focus servo controls. If this control is present on your lens, you’ll
seea ‘focus’ switch on the underside of the handgrip with two settings, ‘servo’ and ‘manual.’
Servo
Set this switch to ‘servo’ or ‘s’ to enable servo focus control. In this mode, your lens
canaccept focus commands from URSA Broadcast G2, Blackmagic Focus Demand
or an ATEM switcher via the lensconnector.
Manual
Set this switch to ‘manual’ to use the focus ring on the lens barrel to control focus.
B4lenses tend to autofocus quite slowly, so using manual control is more common.
NOTE Analog B4 lenses with servos are also supported although the camera will only
power the zoom servo and support electronic iris control. Many of them are standard
definition and may not have the standard 12 pin broadcast connector. If you are going
to use an analog B4 lens, it’s important to make sure it is compatible with your camera
first as some have limited feature sets. It is also worth testing them for their image
circle coverage as some of them may reveal resolution and light fall off towards the
edge of the frame.
13Using Servo Zoom Lenses
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