Why to aim for slightly positive buoyancy
Most buoyancy guides for underwater photography recommend a neutral or slightly negative rig. In practice, a rig between 0g and +200g in water offers a better compromise for the photographer.
The reason is simple. A slightly positive rig stays at shooting height when you let go to adjust your mask, check a gauge or signal your buddy. A negative rig, even by 100g, sinks the moment you open your hands, forcing constant retrieval. Over a 60-minute dive, that mental load costs you in fatigue and missed shots.
The other advantage is safety. In a down-current, a positive rig does not pull you deeper. During a rapid ascent, it does not slow you down. The worst scenario for a photographer is dropping a 3 kg negative rig at 40 metres to deal with a BCD issue. It sinks, and you lose it.
Our Rig Builder displays buoyancy in green when it falls within the optimal zone (-100g to +200g). If your configuration is too negative, it suggests adding float arms or Stix. If too positive, it recommends shorter arms or different materials.
Frequently asked questions
How do I calculate the total weight of my underwater photo rig?+
Use our Rig Builder to add each piece of equipment. The calculator automatically sums up weights in air and water, and displays the overall buoyancy of your configuration.
What is the ideal buoyancy for an underwater photo rig?+
The ideal zone is between -100g and 0g in water (slightly negative). This ensures a stable rig without excessive effort to hold it in position. Float arms and Stix allow you to adjust buoyancy.
Is my underwater photo rig IATA compliant for air travel?+
The Rig Builder automatically checks IATA compliance. Each battery must be under 100 Wh for unrestricted cabin transport. Between 100 and 160 Wh, airline approval is required.
How much does a complete underwater photo rig cost?+
It depends on the level: a beginner compact rig costs around EUR 3,500, an intermediate all-around rig about EUR 7,000, and a pro wide-angle rig can exceed EUR 15,000. Our tool calculates estimated pricing in real time.