What the thread found

• Different ARRI Alexa models require different baseplate solutions due to variations in weight distribution and center of gravity positioning.
• The ARRI Alexa and Alexa Plus models can use third-party dovetail plates like Camera Positioning Systems or Cam-Jam conversion plates.
• The Alexa Studio model has a flat bottom and center of gravity positioned differently than earlier models, making it incompatible with some third-party plates and requiring the official ARRI baseplate for reliable performance.
• When using Alexa Studio with focal lengths of 35mm or shorter at faster movement speeds, the official ARRI baseplate provides better stabilization to eliminate vibration.
• Cinematic Precision offers a plate redesigned to accommodate both Alexa Plus and Alexa Studio models.
• A prototype baseplate by one designer achieved lighter weight and greater stiffness compared to standard mounting solutions by integrating the adapter directly into the plate design.

Depends on

• Discussion occurred in 2013-2014, so current product availability and designs may have evolved.
• Specific weight comparisons mentioned lack detailed documentation.
• Performance claims are based on user experience rather than formal testing.
• The prototype plate mentioned was not yet released at the time of discussion.

Parts

Dovetail Plate, Base Plate

Same gear or parts

1. 2026Eliminating vibration with the ARRI ALEXA 35 on Steadicam®: rigid mounting plate options to bypass the dovetail systemFacebookThe Steadicam Group
2. 2026Swapping the camera between tripod and rig: the cheapest upgrade most operators never makeOperator practice
3. 2026Operating a Steadicam® Zephyr without Volt: drop time, horizon control, and the effect of upper-rig weight distribution on balance.DisputedFacebookSteadicam operators group
4. 2026Swapping an ARRI ALEXA 35 between tripod/studio and Steadicam® mounting: baseplate choice and fastest workflow.FacebookSteadicam operators group