Blackmagic Design URSA Mini Manual De Instalación Y Funcionamiento página 144

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 fall off drastically for resolution and light towards
the edge of the frame.
Ret and VTR
On a B4 lens, the 'vtr' button toggles recording and the 'ret' button is for 'program return'. For
information on how you can configure the 'vtr' and 'ret' button as function buttons on URSA Mini
Pro 4.6K G1, see the 'set function button' section.
The 'ret' and 'vtr' buttons on a B4 lens
Using Servo Zoom Lenses 144