Extension ring for Sea Frogs SONY A7 III - A7S III / A7R IV / A9 housings - SONY 70-200mm F4 lens

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$195.00 USD
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Flat Port for Sony 70-200 F4 available here: (https://seafrogs.com.hk/collections/flat-macro-ports-for-sea-frogs-housings/products/flat-long-port-with-zoom-control-for-sea-frogs-sony-a7-iii-a7s-iii-a7r-iv-a9-housings-sony-70-200mm-f4-lens)

This extension ring is a great addition for underwater photographers who want to capture high-quality images using the SONY 70-200mm F4 lens. With its durable construction and ergonomic design, it provides a secure and comfortable grip while ensuring that your equipment stays safe and protected at all times. The aluminium handle is specifically designed to ensure proper force and weight distribution, making it easier and more comfortable to handle and care for.

We strongly recommend using the handle that comes with the package - under no circumstances you should be using this extension ring with Pistol Grip accessory!

Extension ring with inbuild zoom gear for Sea Frogs SONY A7 III - A7S III / A7R IV / A9 housings - SONY 70-200mm F4 lens

 Compatible housings:

  • Sea Frogs Sony A7 III 
  • Sea Frogs Sony A7 III V.2
  • Sea Frogs Sony A7R III 
  • Sea Frogs Sony A7R III V.2
  • Sea Frogs Sony A7S III
  • Sea Frogs Sony A7R IV
  • Sea Frogs Sony A9 
  • Sea Frogs Sony A9 V.2

Compatible lenses:

  • Sony 70-200mm F4

Compatible ports:

  • Standard port

* Please note that this extension ring is not compatible with a flat long port


  • Hard anodized aluminium 

Depth rate: 40 meters / 130 feet

Package includes:

  • Extension ring
  • Spare O-ring
  • Foam spacer
  • Handle
  • Zoom strap
  • Silicone grease (5ml)