Are there any trade-offs when in “Rialto” mode?
Almost everything is exactly the same, including full access to the internal NDs, dual base ISO, and imager modes. The only feature not available in VENICE while the image sensor block is extended from the camera body is use of the gyro sensor.
Is the "Rialto" a separate camera from VENICE?
No, the VENICE Extension System (CBK-3610XS) -- nicknamed by its first users as "Rialto" after a famous bridge in Venice, Italy -- is a camera accessory that allows you to separate the image sensor block from the camera body by up to 18 feet through a cable connection. With the resulting smaller form factor, operators can move the camera in different ways, better utilize gimbals, and place VENICE in small spaces (for example, tight shots of pilots and drivers).