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Lens Pinout

B4 lens pinoutFemale 12 pin HIROSE
1 RET switch
2 VTR trigger
3 GND
4 Lens Auto/Manual control
5 Iris control
6 +12 V DC
7 Iris position
8 Iris A/R input
9 Extender (doubler) position
10 Zoom position
11 ---
12 ---

Note:
The pinout is standard for all manufacturers (Fujinon and Canon)

Source: SteadicamForum

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