Sony 16-35mm F4 Zoom Gear Installation // Ikelite 200DL Underwater Housing [VIDEO]

Sony 16-35mm F4 Zoom Gear Installation // Ikelite 200DL Underwater Housing [VIDEO]

The Sony Vario-Tessar T* FE 16-35mm F4 ZA OSS lens is a favorite for underwater wide angle photography with the Sony Alpha series mirrorless cameras including the a7 IV and a7S III.

** The product shown in this video has been replaced with the new Zoom Gear # 5509.48. **

The Zoom Gear # 5509.25 is a simple, lightweight, and affordable adapter that allows the 16-35mm F4 lens to be zoomed when used with an Ikelite 200DL underwater housing. John Brigham walks through the steps to attach this gear to your lens and install it on the housing. 

If you enjoy this content make sure you Like + Subscribe on YouTube

Preparation is key

zoom gear installation ikelite housingThis zoom accessory is comprised of a clamp and a sleeve which combine to interface with the gear train and four-lobe zoom knob on the left side of the underwater housing.


zoom gear installation ikelite housingRemove the retaining gear and dust cap from the front of your housing and zoom your lens to 24mm.

Alignment is everything

zoom gear installation ikelite housingTake one of the tabs from the clamp and align it with the indexing dots on the lens.


zoom gear installation ikelite housingDrop the clamp onto the lens ensuring the tabs will end up facing the camera body when installed. Adjust the clamp until you reach the zoom diameter of the lens and check that the clamp is even and straight all the way around the lens.


Get it together

zoom gear installation ikelite housing

Drop the gear sleeve and retaining ring into the front of the housing and tighten using the zoom gear tool included with the housing.


zoom gear installation ikelite housing

Using the drive gear, move the gear sleeve until one of the two notches is in line with the indexing dot on the front of the camera body.


zoom gear installation ikelite housing

Line up your lens and bayonet the lens onto the camera body. Use the drive gear to test for zoom functionality. Now you're ready to attach your chosen port.

What port should I use?

The Sony Vario-Tessar T* FE 16-35mm F4 ZA OSS lens can be used behind either:

Either way it is recommended to add the Anti-Reflection Ring # 0923.72 to reduce unwanted light rays bouncing around the inside of your dome port.

Have a few more questions? Email us via



John Brigham Ikelite Vice PresidentJohn Brigham is the Vice President & head of product development at Ikelite. He was born with a flair for design and an entrepreneurial spirit as son of Ikelite founder Ike Brigham. He worked his way up in the business and is a natural fit in the R&D side of things. John dives the equipment as much as possible to test product and put himself in the "fins" of the user. You may also find him on the other end of an email or phone call when you reach out for product advice and support. When he's not underwater he's flying drones, setting off rockets, training his German Shepherd "T2", and spending time with his family.


Want the easy way to improve your underwater photography? Sign up for our weekly newsletter for articles and videos directly in your inbox every Friday:


Additional Reading

DO'S and DON'Ts of 200DL and 50DL Underwater Housing Set-up [VIDEO]

Sony a7 IV Underwater Housing Photos and Review

Sony A7S III Underwater Photos

My Must Have Underwater Housing Accessory // Cable Top Handle Grip [VIDEO]

Upgrade Your Nauticam | Installing an Ikelite M14 or M16 TTL Bulkhead [VIDEO]  

Reading next

DO's and DON'Ts of 200DL and 50DL Underwater Housing Set-Up [VIDEO]
Update for Existing Underwater Housings for the Canon EOS R6 Mark II