The Vertical format Adapter set is required to use the ALEXA Mini with the sensor orientated portrait ("vertically"). The set is compatible with most existing ARRI camera accessories for ALEXA Mini, such as the Compact Bridge Plates CBP-1 and CBP-2. includes: K2.0019443 1x Vertical Viewfinder Adapter K2.0019442 1x Vertical Format Adapters (4x brackets)