Underwater Photography Guide: Essential Accessories

The quality of an underwater photo rarely depends solely on the camera. In underwater photography, the true leap in quality comes from the right accessories: those that help manage lighting, buoyancy, equipment protection, and ease of use during the dive.

Anyone who photographs in the sea or lakes knows this well. Everyday problems are concrete: reflections on the dome port, a blue cast that washes out colors, poorly illuminated backscatter, controls that are hard to operate with gloves, or bulkiness that throws off trim. That is why choosing accessories must be technical and targeted, focusing on reliability and safety.

1. Choosing the Camera

The camera you choose is the foundation of your underwater photography system. On land, almost any camera works with the right lens; however, underwater photography requires specific features to achieve the best results.

Key factors to consider:

• Sensor Size: The larger the sensor size (preferably APS-C or full-frame), the greater the level of detail captured and the better the low-light performance, making it perfect for underwater shooting.
• Manual Controls: ISO, aperture, and shutter speed settings offer greater control when shooting in low-light conditions underwater.
• Lens Compatibility: Choosing a camera that offers a variety of compatible lenses, especially wide-angle and macro lenses, which are very popular in underwater photography.

For detailed advice on how to choose the best camera, check out our guide to the best cameras for underwater photography.

2. Underwater Housings and Watertightness

The protective housing shields the camera from water, pressure, and physical damage. A carefully chosen housing can prolong the joy of taking photos and keep it safe at various depths.

Housing types:

• Polycarbonate Housings: Lightweight and relatively inexpensive, recommended for beginner and amateur photographers.
• Aluminum Housings: Durable and reliable, often preferred by professional photographers for their ruggedness even at great depths.
• Ergonomics and Maintenance: O-rings, silicone grease, spare parts kits, and intuitive controls are essential to prevent leaks and operational slowness.

3. External Lighting: Strobes and Torches

Water rapidly absorbs warm colors (starting with red). Relying solely on natural light only works in very few specific situations.

• External Strobes: One or two strobes restore color, contrast, and three-dimensionality. A single strobe is great for macro and starting out; dual strobes offer excellent wide-angle control.
• Focus Light and Video Torches: Aiming lights help autofocus in dark areas. Continuous beam torches are designed for video, offering a real-time preview but with lower peak power.

4. Arms and Clamps: Stability First

Strobes alone are not enough. Quality articulated arms and clamps allow precise positioning and prevent annoying backscatter. The golden rule is balance: neither arms that are too short nor too long.

5. Buoyancy and Trim in Water

An underwater camera rig should be neutral or slightly negative. If it is too heavy, it fatigues your wrists; if it is too light, it pulls upward. Using dedicated floats improves photographer stability.

6. Lenses, Ports, and Wet Lenses

• Ports (Dome and Flat Ports): Essential for correcting wide-angle distortion or enabling proper macro lens performance.
• Wet Lenses: Allow you to change framing directly underwater, offering great versatility.

7. Batteries, Memory Cards, and Protection

Reliability relies on small details: charged batteries, fast memory cards, and a proper routine of rinsing and drying after each dive extend equipment life.