Inon SD Mount Cage for HERO3, 3+, 4

Regular price $290.00
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Inon SD Mount Cage for HERO3, 3+, 4

Protects GoPro® genuine Dive Housing – 197' (60m) and firmly holds attachment lens, arm, and flashlight.

Compatible GoPro® cameras

  • HERO4
    – In combination with optional Dive Housing – 197' (60m)
  • HERO3+
    – In combination with optional Dive Housing – 197' (60m)
  • HERO3
    – In combination with packaged housing
    – In combination with optional Dive Housing – 197' (60m)

SD Mount supports speedy lens exchange

Equipped with INON "SD Mount" bayonet system. With "SD Mount", INON "UFL-G140 SD underwater semi-fisheye conversion lens" or "UCL-G165 SD underwater wide close-up lens" exclusively designed for an action camera like GoPro® camera, can be easily and securely mounted/detached underwater. Off course you can use the SD Mount Cage without any attachment lens

* Both "UFL-G140 SD" and" UCL-G165 SD" are designed for underwater use only and not usable on land.

Durable Aluminum Protector

Durable construction machined from an aluminum block protects combined housing even in rough condition.


The SD Mount Cage can hold INON "Direct Base III", "Z Joint", "Z Adapter MV" or "Direct Base YS RT"at its top/bottom surface to install GoPro® camera on various systems for broad application. Packaged "Male Adapter (GoPro) for SD Mount Base/SD Front Mask" can be attached on top/bottom of the cage to use GoPro® compatible accessories.

Upgradable for Serious Shooters

Besides INON "Grip Base D4", "D Holder" can be directly attached on the bottom of the SD Mount Cage. Two of "D Holders" can be installed on both sides at two different angles for steady and comfortable underwater imaging. The SD Mount Cage benefits serious underwater videographers with variety add-ons like an arm extended from D Holder or dual lighting system without excessive load on combined housing.

Tripod Shooting

The tripod screw hole (1/4 inch) on the bottom enables to use a tripod/monopod.

* Depending on tripod head design, some tripod/monopod may not fit to this product. Check if your tripod head can hold this product before actual use. 

LCD/Battery BacPac™ compatibility

The SD Mount Cage can accommodate with LCD Touch BackPac™, Battery BackPac™.

Size 88.5mm/3.5in (W) × 79.9mm/3.1in (H) × 51.3mm/2.0in (D) (excluding protruded parts)
Weight [air] 183g/6.5oz
[underwater] approx. 114g/4.0oz
Material/finishing Corrosion resistant aluminum alloy / rigid black alumite, POM etc.

[When using SD Mount Cage HERO3/3+/4]
* Compatible housing is GoPro® "Dive Housing – 197' (60m)". The GoPro® "Standard Housing - 131' (40m)" packaged with "GoPro® HERO4/HERO3+" is not compatible. The "GoPro® HERO3" is packaged with the "Dive Housing – 197' (60m)".
* When using on land, set FOV mode other than [Ultra Wide] or use without the SD Mount Cage to prevent vignetting observed mainly in Ultra Wide mode even without an attachment lens. (No vignetting underwater)
* Both UFL-G140 SD and UCL-G165 SD are designed for underwater use only and not usable on land.
* The "SD Mount Cage for HERO3/3+/4" is identical with the "SD Mount Cage HERO3/3+" besides model name and product code

April/May 2022 Delays:

Due to further Omicron outbreaks in China, some products may be delayed. Not all brands or products will be affected by this. As some products are kept in stock as a matter of course, these should not be affected.

If you need things urgently please contact us and check ETA on the items you require.

International Shipping

At the moment, our website is only set up to ship within New Zealand. If you live outside New Zealand, please contact us and tell us your full shipping address and what you want to purchase. Please note that our free shipping offer applies to NZ shipping only. Our preferred method of shipping internationally is DHL.

How long will it take for my order to arrive after I make payment?

That depends on where you live and whether we have an item in stock or not. While we do have many items in stock, we don't carry everything. If you need an item in a hurry, it's a good idea to contact us and find out if your item is in stock.

If we have it in stock, we can usually send it out as soon as we receive payment, or you can pick it up. If an item is not in stock, we'll need to order it from our suppliers, which means it can take 1-2 weeks to arrive at your door (usually closer to a week).

Sometimes delivery can take longer, if our manufacturers are out of stock, for example, but this is unusual - we let customers know as soon as possible if something like this happens.

How do you ship my NZ orders?

We use New Zealand Post and CourierPost to ship orders. Our default is courier, though you may organise an alternative with us by contacting us directly. CourierPost aims for next day delivery nationwide between major towns and cities in the North Island. South Island delivery can take two days. If you require next-day delivery in South Island, choose the express shipping option for the South Island. If you spend over $250 get your shipping for free!


We hope you, your families and friends are safe and healthy during the current Covid-19 situation.

As you may know we are a small team at Sea Tech Ltd. Our team has zero close contact with people outside our bubble.

We wish to assure you we are following the government health guidelines surrounding safe operating procedures. Hygiene basics such as hand washing, coughing/sneezing protocols as well as the wearing of appropriate protective equipment such as face masks.

We are continuing to follow the regular updates to government health guidelines and initiatives regarding Covid-19.

Please do not hesitate to contact us if you wish to discuss any aspect of our delivery service via Courier Post New Zealand.

We wish you all the best during these challenging times.

When you buy something from us, the price is literally exactly what it says on the tin.

If you buy something from an overseas supplier, that is most definitely not the case. While the product might seem like a great deal on screen, it's important to understand customs and import costs.

In addition to the ticket price on an overseas purchase, whatever the exchange rate is on the day (this can fluctuate wildly - trust us, we know), there are also tariffs, GST and border processing fees. This can easily add upwards of 25% to the ticket price. Items costing over NZ$1000 also incur import entry transaction fees.

In addition to these extra costs, Customs clearance can also cause delays. Sea Tech has been importing for years - we've got this down to a fine art, and we've built relationships with customs that help our items clear quickly.

By buying from Sea Tech, you avoid all the headaches, delays and extra costs. We handle all this stuff for you, so you don't even have to think about it.

Want to know more?

These Nauticam housings are non-returnable, non-refundable, non-cancellable, and may be subject to extended lead times as they are manufactured on demand. We always do our best to meet trip deadlines so please advise us if you have a trip coming up!

Why choose Sea Tech?

We're Official in a world of cheap knock-offs

Sea Tech has built its reputation and business on knowing our stuff, giving you the best, whether that's advice or products, and helping out when you need a hand. Underwater photography can be tricky and expensive, so it's best to buy local and buy official.

Why Choose Sea Tech

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