What the thread found

• The AB power tap on top of the camera can supply both a Bartech follow focus and an M-type motor simultaneously without immediate problems
• The 4-pin Hirose connector at the back of the camera is unreliable for powering accessories and blows fuses easily
• Running follow focus equipment from the top AB output on DSR450 can cause the camera to crash and require battery removal to cold restart
• Using a single external IDX battery caused the battery fuse to blow when tuning the motor, but two external IDX batteries only occasionally blew a fuse
• Powering follow focus accessories from Nicad batteries was more stable than from IDX lithium batteries on this camera model

Depends on

• The camera crash occurred in one specific real-world shooting scenario and may depend on total power draw or specific camera firmware
• The fuse blowing behavior with IDX batteries was inconsistent rather than consistent
• Setup included additional power draw from a motorized lens adapter

Gear in this thread

BFD

Parts

Follow Focus

Same gear or parts

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4. 2025LC-1 (Lens Control-1) follow focus system: wired architecture, motors, and early operational experience (1990s).FacebookThe Steadicam Group