iPhone 16 Pro Max underwater photography test: our 2026 rating.

The iPhone 16 Pro Max is the large format model. It's the choice for those who don't want to compromise. Underwater, this logic holds true, but it also brings its own limitations. A larger chassis means more metallic surface exposed to temperature differences. A larger battery provides more battery life, but also generates more heat to manage. I've used it for diving in various configurations, from the temperate Mediterranean to the tropical Indo-Pacific, and here's what I've learned.

Ideal Profile: The serious underwater videographer who wants ProRes, solid battery life, and the best telephoto lens available on a smartphone. They primarily dive in warm or temperate waters and are willing to invest in a rigorous anti-condensation protocol.

B1 OpticsThe optical system of the 16 Pro Max is a key strength of this device. The 48 MP main sensor with an aperture of f/1.78 captures a significant amount of light, which directly translates underwater into cleaner images as the depth increases and light becomes scarce. The 48 MP ultra-wide-angle lens with a 13 mm focal length is excellent for capturing wide scenes, wrecks, and schools of fish. The 5x telephoto periscope lens, inherited from the 15 Pro Max and refined here, allows you to get closer to shy subjects without disturbing them. This is a real advantage over standard models.

Specs B1 Main sensor: 48 MP, f/1.78, 24 mm (2nd generation optical stabilization) Ultra-wide-angle: 48 MP, f/2.2, 13 mm Telephoto: 12 MP, f/2.8, 120 mm periscope, 5x optical zoom LiDAR: integrated 3D TOF scanner

B2 RAWProRAW is the main reason why serious photographers choose an iPhone Pro. Underwater, a blue or green cast is inevitable. With a JPEG file, you can recover very little. With ProRAW, you have complete freedom to recreate lost reds and oranges, precisely adjust white balance, and work on shadows without excessive noise. ProRes video in 4K at 120 fps is another level entirely- it provides smooth slow-motion footage of fish movements and a color richness that H.264 cannot approach. This is the real deal for anyone who wants to produce high-quality underwater video content.

Specs B2 Photo: ProRAW (DNG up to 48 MP) Video: ProRes 4K at 24, 25, 30, 60, and 120 fps Log Video: Apple Log is available for color grading. Note: No ProRes RAW video (introduced on the iPhone 17).

B3 StorageThe ProRAW files weigh between 25 and 75 MB depending on the scene. A one-hour ProRes 4K 120 fps recording can exceed 200 GB. Therefore, choosing the right internal storage is crucial: opt for a minimum of 512 GB, or 1 TB if you're doing liveaboards. The USB-C 3.2 port at 10 Gbps allows you to transfer 100 GB in just a few minutes to a portable SSD. The Wi-Fi 7 is also very fast for wireless transfer to a NAS or an iPad Pro on the boat. This is a field workflow that works well.

Specs B3 Internal Storage: 256 GB, 512 GB, 1 TB (NVMe) USB-C: 3.2 Gen 2 at 10 Gbps Wi-Fi: Wi-Fi 7 (802.11be), up to 5.8 Gbps theoretical Bluetooth: 5.3 * AirDrop: fast peer-to-peer transfer to Mac or iPad

B4 Thermal ImagingThis is the primary concern with the 16 Pro Max. The titanium chassis is an excellent thermal conductor, which is beneficial for dissipating heat from the processor in warm waters. However, in cold water, this same conductivity creates a risk of condensation forming inside the housing. The temperature difference between water at 14°C and the ambient air at 25°C can cause fogging on the housing lens or inside the case. The larger size of the 16 Pro Max slightly amplifies this risk compared to the 16 Pro, as the surface area in contact with the air inside the housing is greater. The use of silica gel is mandatory below 18°C.

Specs B4 Chassis: Grade 5 titanium (frame) + ceramic glass (back) Processor: Apple A18 Pro (3 nm) Thermal Management: Integrated vapor chamber Risk of condensation in cold water (below 18°C): High - silica gel mandatory * Time until overheating in tropical conditions (28°C+): Approximately 35 minutes

B5 BatteryThe 4685 mAh battery is the most generous ever integrated into an iPhone. For a standard day of diving with 2 to 3 dives and reasonable video recording, it easily lasts the entire day. In intensive ProRes 4K 120 fps mode, battery consumption increases, and you'll likely end the day with 20-30% remaining. A 10,000 mAh power bank between dives solves the problem. The standard Li-Ion chemistry performs well in cold water, without the capacity drop seen in some lower-quality Li-Po batteries.

Specs B5 Battery: 4685 mAh Li-Ion Fast Charging: 27W wired, 25W MagSafe Performance in Cold Water: Stable, no significant drop until 10°C Estimated Battery Life: 3 dives (moderate recording): Sufficient without recharging

Before each diving session, remember to check your external battery. Use our portable battery comparator tool to choose the power bank that's right for your underwater housing and your desired battery life.

B6 AutofocusThe autofocus on the 16 Pro Max is among the best available on smartphones. The dual-pixel PDAF covers the entire main sensor, ensuring fast focusing even on fast-moving subjects like dolphins or rays. The LiDAR provides valuable assistance in low-light conditions, where contrast-only systems struggle. In practice underwater, the autofocus is reliable, and losing the subject is rare. The macro mode, available through the ultra-wide lens, allows you to get as close as 2 cm to the subject for portraits of nudibranchs or small crustaceans.

Specs B6 Autofocus: Dual-pixel PDAF on the main sensor and ultra-wide lens. Assistance: LiDAR 3D TOF scanner. Macro: Minimum distance 2 cm (via ultra-wide lens). Subject Tracking: Yes, with underwater subject detection in video mode.

B7 Housing

The Divevolk SeaTouch 4 Max is the reference housing for the iPhone 16 Pro Max. It integrates compatibility with the Camera Control button introduced on the iPhone 16 Pro models, allowing you to trigger the shutter, zoom, and adjust exposure without touching the screen. Full touchscreen access works well up to 10 meters. Beyond that, water pressure can interfere with the capacitive buttons, but the physical button takes over. The maximum certified depth is 40 meters, sufficient for almost all recreational dives.Specs B7 Recommended Housing: Divevolk SeaTouch 4 Max Maximum Depth: 40 meters Camera Control Compatibility: Yes Touchscreen Access: Full * Optical Lens: Anti-reflective tempered glass

To verify the exact compatibility of your smartphone and compare usable volumes, please check if the dimensions of your model fit within this housing by using this housing compatibility checker.

Housings

The Divevolk SeaTouch 4 Max is the only housing I recommend without reservation for this device. There are cheaper alternatives, but they compromise either touchscreen access, camera control button compatibility, or both. For a device at this price, don't skimp on the housing.

Field Workflow

Prepare the iPhone the night before: charge it to 100%, place 2 to 3 silica gel packets inside the housing, and check the seals. Launch the camera app before closing the housing. Underwater, use the Camera Control for quick adjustments. After the dive, allow the housing to stabilize in temperature before opening it - especially in cold water. Connect the USB-C to a portable SSD to offload the large files as soon as you return to the boat.

Important ConsiderationsCondensation in cold water: This is the number one risk with the 16 Pro Max. The titanium housing and large format amplify this phenomenon. Below 18°C, using silica gel packets is not an option, it's a necessity. Replace the packets every two dives.

Housing size: The 16 Pro Max is large. Make sure your dive bag can accommodate the closed housing before you travel.

ProRes and storage: One hour of ProRes 4K 60 fps exceeds 100 GB. Plan for a minimum of a 1 TB portable SSD for liveaboards.

Price

A new iPhone 16 Pro Max costs between 1,299 and 1,599 euros, depending on the storage capacity. Add 350 to 400 euros for the Divevolk SeaTouch 4 Max. The total budget exceeds 1,700 euros. This is a significant investment. If your budget is tighter, the iPhone 16 Pro offers 90% of the performance at a lower price, or a used iPhone 15 Pro Max remains an excellent option for under 900 euros.

The Instructor's Perspective: A high-end smartphone like the iPhone 16 Pro Max offers remarkable ergonomics within its underwater housing, but the laws of physics underwater remain the same. At depths of 5 to 10 meters, water absorbs the red spectrum, and the automatic white balance produces washed-out, greenish hues.

No computational algorithm can replace precise positioning relative to the sun or stable buoyancy. In our AquaExposure underwater photography training program, you learn the natural light exposure protocol and a passive approach to marine life to capture sharp images without bulky equipment.

Check the compatibility and dimensions of your model on our smartphone housing comparison tool. For thermal protection, also consult our guide on smartphone overheating and condensation in underwater housings.

Are you undecided between several devices? Use our underwater photography equipment comparison tool to compare this device with other tested models.