The main difference between the PRO version and the usual one is the port for the fiber optic cable and the ability to control the aperture wheel located on the front side of the camera.
Sea Frogs 40M/130FT Underwater camera housing for Sony A9 II
Full camera control is available, except for the joystick.
Materials :
Polycarbonate
ABS plastic
Stainless steel
EPDM rubber
O'ring sealed buttons with spring
Key features:
Vacuum Pump System port
Inbuilt leak detection sensor
Interchangeable port system
Synchro cable port
Dual Fiber-Optic port (Sea&Sea type)
Stainless steel mounting plate 1/4" Thread
The reinforced metallic bottom plate
In order to connect an external strobe with this housing, it will require to use of a Dual 5-Pin Sync Cord (purchase here)
