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2015Operating forum

Preventing vibration of Alexa cameras mounted on cinema sleds

What the thread found

  • Vibration issues with Alexa cameras on sleds typically stem from loose components, flexible mounting plates, structural flex in the sled or its parts, or vibrating accessories.
  • Mounting the camera at both front and rear of the camera body prevents vibration better than front-only mounting.
  • The camera body acts as a lever that can bend the dovetail plate if not properly braced at the rear, causing vibrations.
  • A rear brace or support point at the back of the camera significantly reduces flex-induced vibration.
  • A simple and inexpensive solution involves using a threaded washer or thin nut at the rear mounting point to secure the camera to the dovetail.
  • Rear bracing hardware can be fabricated using a screw with an appropriate head size and a thin nut filed to fit the camera's rear recess.

Depends on

  • The discussion references specific mounting plates and brackets but does not explain which designs are superior for particular sled types.
  • The suggested rear bracing hack requires metal filing and custom fabrication, so results depend on execution skill.
  • No quantitative measurements of vibration reduction are provided.

Parts

Dovetail Plate

Same gear or parts

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