SteadiHub
2007Cameras (Film/Video/HD) forum

Power requirements and practical considerations for using a Sony F900 cinema camera on a Steadicam rig with Pro35 lens adapter

19 years old. Gear and prices may have changed since.

What the thread found

  • The Sony F900 is a 12-volt camera that consumes significant power, typically draining batteries in 45 minutes during active shooting and standby.
  • The F900 outputs only HD Component or HD-SDI signals; achieving standard definition output requires either the optional 901 SDI camera back or an external downconverter like the AJA or Miranda unit.
  • The F900R variant is substantially smaller, lighter, and more power-efficient than the original F900, with an optional internal downconverter board and built-in SD-SDI output capability.
  • Mounting a Pro35 lens adapter adds approximately 8 inches to overall length and 6 pounds, making the already long F900 even more difficult to control and anticipate moves with.
  • Using Dionic 90 or Dionic 160 batteries rotated through a sled capable of holding multiple batteries provides better run times than relying on camera-mounted batteries.
  • The F900 battery plate includes a standard Anton Bauer mount with 2-pin P-tap connector, though alternative mounts may be fitted.
  • External downconverters mounted to the camera back can draw power from the batteries; using an Anton Bauer adapter plate with 4-pin XLR output connection to a downconverter eliminates the need for a camera-mounted battery.
  • Running a lightweight HD-SDI monitoring cable from the sled to the DP allows HD signal monitoring for most shots while remaining cable-free when absolutely necessary.
  • The extended length and weight distribution of the F900 with Pro35 adapter significantly affects Steadicam operation, requiring earlier move anticipation and modified timing compared to handheld operation.

Depends on

  • Experiences reported are from 2007 and earlier camera generations; newer technology may have different specifications.
  • Power consumption figures based on specific shooting scenarios with particular accessories and may vary with different configurations.
  • Some respondents discuss third-party modifications and aftermarket components whose compatibility and performance may be equipment-specific.
  • The F900R downconverter board availability varies by rental house; not all rental units include this option.

Parts

Dovetail Plate

Same gear or parts

  1. 2026Swapping the camera between tripod and rig: the cheapest upgrade most operators never makeOperator practice
  2. 2026Eliminating vibration with the ARRI ALEXA 35 on Steadicam®: rigid mounting plate options to bypass the dovetail systemFacebookThe Steadicam Group
  3. 2026Tightening a loose quick-release lever on the Top Stage dovetail plate, and preventing camera slip during shoulder operation.DisputedFacebookThe Steadicam Group
  4. 2026Managing weight constraints when flying large-format film cameras with heavy anamorphic lenses on a Steadicam rigGeneral Discussion
Read the original threadAsk about this threadThe answer cites the archive