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.
Compatible lenses:
Sony FE 16-35mm F/4 ZA OSS(Autofocus only) Works from 17mm to 35mm
Sony FE 24-70mm F/4 ZA OSS (No zoom available, use at 24mm only)
Sony FE 24mm F1.4 GM (Autofocus only)
Sony FE 28-70mm F3.5-5.6 OSS (Autofocus only, Manualzoom gear included)
Sony FE 50mm F1.8 (Autofocus only)
Sony FE 50mm F2.8 Macro (Autofocus only)
Sony FE 35mm F1.4 GM Lens (Autofocus only)
Sony FE 55mm F1.8 ZA Carl Zeiss Sonnar T* (Autofocus only)
Sony FE 85mm F1.8 (Autofocus only)
Materials :
Polycarbonate
ABS plastic
Optical glass
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)
Standard flat port (Optical glass)
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) or a Single 5-Pin Sync Cord (purchase here), or a Fiber-optic cable (purchase here) with a Flash trigger (purchase here).
