How to Choose the Perfect Underwater Camera

Whether you’re snorkeling in crystal-clear reefs, diving into deep blue waters, or simply capturing beachside memories, having the right underwater camera can make or break your experience. With so many options available—from rugged action cameras to high-end DSLRs—choosing the best one for your needs can be overwhelming.

In this guide, we’ll break down the key factors to consider when selecting an underwater camera, compare different types, and recommend the SJCAM SJ20 Dual Lens Action Camera—a budget-friendly yet powerful option for adventurers.

Table of Contents

Why Do You Need a Specialized Underwater Camera?

Standard cameras and smartphones aren’t built to handle underwater conditions. A dedicated underwater camera offers:

✔ Waterproofing – Resists water pressure at depth.
✔ Corrosion Resistance – Survives saltwater and sand.
✔ Image Optimization – Corrects color loss and distortion.
✔ Durability – Shockproof and freeze-proof for extreme conditions.

Without these features, your photos may turn out blurry, blue-tinted, or ruined by water damage.

Waterproof and Pressure – Resistance: Ordinary cameras are not designed to be submerged in water and will be damaged by water ingress. In contrast, specialized underwater cameras are equipped with waterproof seals and housings that allow them to be used at certain depths underwater without being affected by water pressure and water leakage. For example, some underwater cameras can withstand depths of up to 30 meters or more, enabling photographers to capture the beauty of the underwater world at different depths.

Optimal Imaging Quality: Underwater photography presents unique challenges such as reduced light, color distortion, and refraction. Underwater cameras are designed to address these issues. They often have lenses and optical systems specifically calibrated for underwater use, which can correct for color shifts and reduce the effects of refraction, resulting in clear, sharp, and true – to – color images. In addition, they usually have high – sensitivity image sensors and excellent low – light performance to capture sufficient details even in the relatively dark underwater environment.

Key Factors to Consider When Choosing an Underwater Camera

1. Waterproof Depth Rating

Snorkeling (0–10m): Most action cameras (e.g., GoPro, SJCAM) work without a housing.
Scuba Diving (10m+): Requires a dedicated underwater housing.
Free Diving (20m+): Look for cameras rated beyond 20m.

Example: The SJCAM SJ20 is waterproof to 30m with its included case, making it great for snorkeling and shallow dives.

2. Image & Video Quality

Resolution: 4K is ideal for sharp footage.
Sensor Size: Larger sensors (1” or APS-C) perform better in low light.
Stabilization: EIS (Electronic Image Stabilization) reduces shakes.

3. Lens & Zoom Capabilities

Wide-Angle (170°+): Best for reefs and group shots.
Macro Mode: Essential for small marine life.
Optical Zoom: Helps frame distant subjects without quality loss.

4. Battery Life & Storage

Cold water drains batteries faster—carry spares.
SD Card Capacity: 128GB+ recommended for 4K video.

5. Ease of Use

Touchscreen – Helpful for framing underwater.
One-Hand Controls – Buttons should be easy to press with gloves.

Types of Underwater Cameras Compared

Which Should You Choose?

Beginners/Casual Users: Action cameras (best value).
Enthusiasts: Compact cameras (better zoom/macro).
Pros: DSLRs/Mirrorless (ultimate quality).

Best Budget Pick: SJCAM SJ20 Dual Lens Action Camera

The SJCAM SJ20 Dual Lens Action Camera is a game-changer for adventurers seeking professional-quality footage without the premium price tag. This innovative camera features a dual-lens system, combining a 170° ultra-wide front lens for immersive POV shots with a 90° bottom lens for creative low-angle perspectives—perfect for capturing dynamic underwater scenes, skiing action, or vlogging.

With 4K/30fps video and 20MP photo capabilities, the SJ20 delivers crisp, vibrant content, while its built-in EIS stabilization ensures smooth footage even during high-motion activities. The IPX7 waterproof design (up to 30m with included housing) makes it ideal for snorkeling, and the dual touchscreens (front and rear) simplify framing for solo creators.

Additional features like Wi-Fi connectivity, time-lapse, slow motion (1080p/60fps), and voice control enhance its versatility. Compact yet powerful, the SJ20 outperforms competitors in its class, offering GoPro-like functionality at a fraction of the cost.

Key Features:
✔ Dual-lens system (170° + 90°)
✔ 4K/30fps video + 20MP photos
✔ IPX7 waterproof (30m with case)
✔ Dual touchscreens for easy operation
✔ Built-in EIS stabilization

For adventurers who want great quality without overspending, the SJCAM SJ20 stands out with:

✔ Dual-Lens System – Front (170° ultra-wide) + bottom (90°) for versatile shots.
✔ 4K/30fps Video & 20MP Photos – Crisp underwater footage.
✔ Built-in EIS Stabilization – Reduces shakes in currents.
✔ Waterproof to 30m (with included case) – No extra housing needed.
✔ Affordable Price – Far cheaper than GoPro or Olympus.

Essential Underwater Camera Accessories

Red Filter – Restores colors below 5m.
Floating Hand Grip – Prevents sinking if dropped.
Underwater Lights – Improves visibility in dark water.
Anti-Fog Inserts – Keeps the lens clear.
Extra Batteries – Cold water drains power fast.

5 Tips for Better Underwater Photos

Get Close to Subjects – Water reduces clarity.
Shoot in Natural Light – Stay shallow for vibrant colors.
Use Manual White Balance – Auto WB often fails underwater.
Stabilize Your Camera – Avoid blurry shots with a tray or grip.
Edit in Post – Boost contrast and saturation for punchier results.

Final Verdict: Best Underwater Camera for You

Budget Pick: SJCAM SJ20 (best value for snorkeling).
Mid-Range: Olympus TG-6 (great for macro).
Pro Choice: Sony a7 IV + Housing (unmatched quality).

For most adventurers, the SJCAM SJ20 delivers excellent 4K quality at an unbeatable price, making it the perfect underwater camera for travelers, snorkelers, and content creators.