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Operating a Steadicam Zephyr rig with A30 arm carrying an Alexa camera - hand technique, arm setup, and power configuration

DisputedParticipants disagreed and reached no conclusion. Read the findings as positions, not as an answer.

What the thread found

  • When operating with one hand on the gimbal and one on the handle, keep the gimbal hand light while using the handle hand with normal grip to guide horizontal movement and control arm pitch
  • Both hands should remain in contact with the sled at all times during normal operation to control movement in all directions; hands-free operation is possible only with perfect setup and should not be attempted without assistance
  • The gimbal handle should be held at the inner end with fingertips rather than a full hand grip
  • Arm angle should be set based on personal preference and desired lens height rather than as a solution for managing heavy loads; positioning slightly below horizontal works well for slow walking shots
  • The A30 arm is rated for a maximum of 30 pounds combined weight including camera, sled batteries, and all mounted accessories, and exceeding this limit risks damaging the arm
  • Arm tension should be adjusted to find the sweet spot where the sled sits steady during a jump test, rather than increasing tension to raise the lens height
  • The Zephyr rocker switch with dual V-Mount batteries selects between 12 volts in parallel mode and 24 volts in series mode
  • A dual battery plate adapter on the dovetail combined with standard battery mounting allows hot-swapping batteries and extends runtime while reducing required post extension
  • The Zephyr post wiring gauge may be too small for cameras with high power draw like Alexa, resulting in voltage drop under load and requiring either frequent battery changes or professional wiring upgrade
  • Longer post length with extended drop time during balance improved performance compared to shorter post length
  • Using a wider-angle lens produced smoother results than a longer focal length on the same rig
  • Dynamic balance testing should be done at moderate spin speeds rather than fast spinning, as excessive speed can hide balance inaccuracies

Depends on

  • The operator was new to vest and arm systems despite extensive handheld gimbal experience
  • No professional workshops were accessible to the operator in their region at the time
  • The Zephyr operation manual was unclear regarding arm socket screw adjustment
  • The combined weight of the rig with matte box and counterweights exceeded the A30 arm rating of 30 pounds
  • Alexa power requirements created complications with the Zephyr's wiring and voltage configuration
  • The thread contains contradictory information about safe weight limits on the A30 arm, with one experienced operator reporting using 43 pounds while others warned against exceeding 30 pounds

Gear in this thread

Zephyrcatalog

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