Ribcage AIR Mod Kit – Solo Pro Bundle

USD $275.00


Everything you need to get the best footage from your Solo! Our Ribcage AIR mod kit for Hero4 plus a crisp distortion free 4K wide angle 3.4mm M12 lens. Also included are a 3 pack of neutral density filters (0.3, 0.6, 0.9) and our new Dead Weight counterbalance kit for Solo. Install Back-Bone’s custom, all aluminum Ribcage AIR mod kit on any GoPro Hero4 Silver or Black (not included). Your camera will then be able to take micro M12, CS-Mount or C-Mount lenses. Designed to be light weight for small UAVs and GoPro stabilizers the Ribcage AIR was built specifically to fit the 3DR Solo gimbal! Our new ‘Deep Socket’ M12 mount is compatible with almost all M12’s and reduces weight by not requiring additional adapters. Use the Dead Weight counterbalance system to perfectly balance your camera based on the lens you are using. Detailed step by step video instructions. Note: CS and C-Mount lenses are not recommended for use on Solo or any other small GoPro gimbal. The Ribcage AIR mod kit is not compatible with Hero3/3+

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**Please note that this product is not necessarily for everybody. It requires you to take apart and re-assemble your camera which will void the manufacturer’s warranty. Back-bone has no control over the end user’s skill level and cannot be held responsible for accidental damage. We recommend that you view the  installation video on our support page before you buy to make sure this is right for you. If you don’t feel comfortable performing the installation yourself we also offer Hero4 Silver and Black cameras that have already been modified and tested. Contact us to inquire about our installation services if you already own a compatible camera. Many of our dealers also offer installation services.





Designed to be as light as possible, the Ribcage AIR for for GoPro Hero4 is perfect for any aerial platform but we designed it specifically with the 3DR Solo in mind. Benefit to the max from 3DR’s unique full camera control – only now with interchangeable lenses to get exactly the look you want. Many distortion free wide angle lenses are available. Use M12 lenses under 10 grams on the Solo or most other small GoPro handheld or aerial gimbals*.  Use CS, C-mount or larger lenses on bigger aerial platforms and gimbals. You can even fly with some great vintage D-Mount and Bolex lenses.

All of the lens mounting rings are easily removable for filter replacement and sensor cleaning. Combine up to two custom filters in camera at the same time.  You won’t need filters for all your different lenses anymore, just  for the camera! Now you can use ND, cold mirror, NDVI and other custom wavelength filters with your M12 lenses, or lenses that have no filter threads on the front. Choose from our line of tried and tested high resolution lenses, or use your own. Browse through our library of high resolution lenses to find the right lens for your needs!

* M12 lenses under 10 grams recommended for Solo and other GoPro gimbals. Back-Bone’s ‘DEAD WEIGHT’ gimbal balancing kit for Solo (included) recommended for best results and to reduce wear on the gimbal. CS and C-Mount lens types are too heavy for GoPro based gimbals. These are recommended only for larger platforms. 

Features include:

  • Specially designed to fit the 3DR SOLO gimbal!
  • New included ‘Deep Socket’ M12 mount is compatible with even more lenses, reducing the need for heavy adapters
  • Out of the box compatibility with M12(S-Mount), CS-Mount , C-Mount lenses and accessories**
  • 4K 3.4mm M12 lens – No Fisheye!
  • ND Filter Set to reduce flicker, ‘jello’ and provide pleasing motion blur
  • Combine up to two different filters of two different sizes in camera at the same time
  • Custom Back-Bone GOcase included!
  • Fully compatible with the EXO mini Mounting Bracket
  • Easily removable mounting rings allow access to the image sensor for cleaning
  • Adjustable flange distance for CS and C-Mount lenses

Finally, a light weight, small form factor 4K camera with interchangeable lenses! It’s the GoPro Hero4 Black that you know and love, but supercharged with Back-bone’s custom all aluminum Ribcage AIR mod kit. Now you have the ability to pick the perfect lens for any situation so you can shoot in amazing 4K 30fps or at 1080p at speeds up to 120fps. Out of the box the Ribcage is compatible with micro M12, CS-Mount and C-Mount lenses. You can attach virtually any other type of manual lens via readily available C-Mount adapters found online and in stores.  Take advantage of what professional lenses have to offer: manual focus control, a more cinematic depth of field, macro shooting, optical zoom and iris control. You’ll receive a removable tripod mount so you can connect your camera to professional mounts and supports. Want night vision? Just take out the IR cut filter so you can see in the dark with any IR light source! Have a difficult lens? Use the adjustable flange distance feature to get the perfect results. The Ribcage modified camera is configured with a removable IR-cut filter for maximum versatility and easy cleaning of the filter and sensor if required. Note that the filter must be added when using the camera for the first time.

When using our 7.5mm M12 lens you can either remove the IR-cut filter or reconfigure the camera with the supplied rubber O-ring instead of the plastic spacer to achieve proper focus.


No more quarters and tape! Built specifically for the 3DR Solo gimbal, the DEAD WEIGHT balancing kit for Solo allows you to easily counterbalance lenses, filters and accessories mounted to your stock GoPro or Ribcage AIR modified cameras. Ultra dense metals were chosen for the counterweights to pack the most punch in a tiny size. Almost 2x heavier than lead! Our easy to use snap-on mounting system clips easily onto the back of your Solo gimbal. You can then snap our custom weights into any of the 10 clip positions. Just position the weights until your camera is balanced vertically and then slide the entire assembly left or right to balance it horizontally. A balanced gimbal means more efficient operation, less stress on the motors and of course butter smooth video.






3.4mm11/2.3″ 4K 3.4mm Rectilinear M12 Lens

This lens is light weight at 2g and super sharp. Special optics make this lens ‘rectilinear’ so there is no fisheye distortion at all. Excellent edge to edge sharpness.

Additional info:

  • Designed for 1/2.3″ GoPro sensor
  • Aperture: f2.8
  • FOV: 85° Horizontal
  • Weight: 5g
  • IR-Cut Filter: Yes
  • Lens Cap
  • Locking Ring
  • 18 Megapixel

ND Filter 3-Pack

Get exactly the look you’re going for with these neutral density filters. Reduce ‘jello’ effects as well as gain a pleasing motion blur in bright conditions. Use them with the built in filter socket inside your Ribcage modified Hero4 camera. Perfect for drone users that want to use a filter with their small M12 lenses. 0.3, 0.6 and 0.9 densities included.

Unleash Your GoPro!

Package includes:

  • 1x Ribcage AIR Mod Kit
  • CS/C lens mounts
  • 1x Deep Socket M12 lens mount
  • 2x IR cut filter (15mm)
  • 1x IR cut filter holder / spacer
  • 1x Micro Allen key for adjusting the flange distance
  • 1x packet of spare screws, L-keys and hardware
  • 1x flexible image sensor extension
  • 1x packet of thermal paste
  • Dead Weight Snap-on mounting system (counterbalance)
  • 4x 4g weights
  • 2x 2g weights
  • 1x retaining bracket
  • 3x 15mm ND filters (0.3, 0.6, 0.9 OD)
  • 1x 1/2.3″ 3.4mm 18MP M12 lens

Please note that the slim Hero4 waterproof housing is included as it comes with the original camera. For waterproof use we recommend picking up the extended backdoor for the case and to use our 7.5mm Low Profile lens with the standard M12 mount. You can cut a piece of foam to fill the small space behind the camera, or put in the protective plastic cap that comes with the camera; it just so happens to be exactly the right thickness. When using our 7.5mm M12 lens you can either remove the IR-cut filter or reconfigure the camera with the supplied rubber O-ring instead of the plastic spacer to achieve proper focus.

Additional information

Weight 0.4 kg
Dimensions 23 x 21 x 4 cm

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