Xiaomi 17T Pro underwater photography test: our rating for 2026.

To learn how to get the most out of your gear underwater, discover the [AquaExposure Training](/lms). --- # Underwater Photo Testing of the Xiaomi 17T Pro: Our Score for 2026

The Xiaomi 17T Pro arrives in a specific niche of the product range. It sits above the standard Xiaomi 17, with seemingly identical specifications on paper, and below the 17 Ultra, which boasts a full-frame 1-inch sensor for €1400. For an underwater photographer, the question isn't philosophical: is the €999 price tag of this model worth it compared to saving up for the Ultra, or opting for something cheaper?

This test evaluates the 17T Pro solely from the perspective of underwater photography in natural light. No flash or strobe is used. The available light ranges from 5 to 25 meters, with RAW format serving as a safety net. The test also considers the reality of a day of diving, including battery life, thermal performance, and autofocus under real-world conditions.

To place this model within the complete range of smartphones tested, see our comparison of underwater photography smartphones for 2026.

Overall AquaExposure score: 4.1/5

This device is designed for: the underwater photographer using an Android phone who wants Leica's color science and a 5x periscope lens in a package costing €999, with battery life that comfortably covers two to three dives per day.

This device is not ideal for: dives beyond 25 meters, where the 1/1.31-inch sensor starts to show its limitations compared to the 1-inch sensor of the Ultra, and for extreme macro photographers (minimum periscope distance is 30 cm compared to 9 cm on the main sensor).

The Xiaomi 17T Pro retains the Light Fusion 950 sensor (50 MP, 1/1.31 inch) from the standard 17, but adds a periscope telephoto lens with 50 MP and 5x optical zoom (equivalent to 115 mm) with OIS stabilization. This is the main architectural difference between the 17 and the 17T Pro - not the main sensor, but the third module.

For natural light diving, this 5x periscope is useful whenever you want to frame subjects at a reasonable distance (wary fish, turtles that are moving away) without having to get closer and disturb the scene. The minimum distance of the periscope is stated as 30 cm - which excludes pure macro photography, but is very suitable for portraits of fish at 40-60 cm.

The main sensor with its f/1.7 aperture and hybrid Leica Summilux optics (1G + 6P) captures light effectively up to 20-25 meters in good natural lighting conditions. The performance in backlit situations is well controlled - the Leica coating reduces flare from direct light sources (e.g., sunlight). A slight longitudinal aberration remains visible when the sun is low in the frame, which is typical for this sensor format.

The macro function on the main sensor works at a minimum distance of approximately 9 cm - useful for nudibranchs and small invertebrates. For extreme macro photography (subjects smaller than 2-3 cm), an external wet lens is still necessary, as with all smartphones of this generation.

Specs B1 - technical details

Main sensor: Light Fusion 950, 1/1.31 inch, 50 MP, f/1.7, 23 mm, OIS. Ultrawide: 12 MP, f/2.2, no OIS. Periscope telephoto lens: 50 MP, f/3.0, 115 mm (5x), OIS, minimum focusing distance 30 cm. Main sensor minimum focusing distance: approximately 9 cm. ISO range: 50 to 6400 (auto mode), expandable up to 12800 in manual mode. RAW buffer: estimated 20-25 DNG images before saturation (Dimensity 9500). Shutter lag: 60-80 ms (Dimensity 9500, very responsive). Leica Summilux coating - minimal longitudinal flare under standard conditions.

B1 Score: 4.3/5

The 17T Pro offers native RAW in DNG 12-bit format directly from the Pro mode of the Xiaomi app. The DNG 12-bit format is the current standard on high-end Android devices - functional and sufficient for white balance correction in post-processing, even though the 17 Ultra and the standard Xiaomi 17 offer 14-bit in certain modes.

Leica's color science is available in two profiles: Leica Authentic (neutral rendering, faithful to real colors) and Leica Vibrant (accentuated micro-contrast). For underwater photography in natural light, the Leica Authentic profile is a logical starting point. Color correction for white balance underwater – always tricky due to the absorption of reds and oranges – results in less color shift compared to the saturated profiles offered by some competitors.

For video, the H.265 10-bit format with Xiaomi Log can be directly used for calibration. The white balance can be locked in Kelvin within the native Pro Video mode - essential for maintaining consistent colorimetry from one clip to another.

MotionCam Pro is fully compatible via the Camera2 API on the Dimensity 9500 on Android GMS. It unlocks RAW video image by image and Focus Peaking for precise control of sharpness underwater. The Blackmagic Camera app (Android) is also confirmed to be compatible.

Specs B2 - technical details

RAW native: Linear 12-bit DNG, available in the native Pro app mode. Color science: Leica Authentic / Leica Vibrant, co-developed by Leica. Video codec: H.265 (HEVC) 10-bit, Xiaomi Log available (Rec.2020). Video white balance: Lockable in Kelvin (native Pro Video mode). OS: HyperOS 3 (Android 16). MotionCam Pro: Compatible via Camera2 API (Android GMS, full access). Blackmagic Camera (Android): Compatible, confirmed at launch. Focus Peaking: Native in Pro mode (positive difference compared to standard Xiaomi 17).

B2a RAW native: 4.5/5 - B2b MotionCam Pro (GMS): 4.5/5 - B2c Leica color science: 4.5/5

Score B2: 4.5/5

The 17T Pro is available in 256GB, 512GB, and 1TB storage options (UFS 4.1). The system and apps occupy approximately 40GB, leaving 215GB free on the 256GB version. A single RAW DNG 12-bit image at 50MP weighs between 20MB and 35MB depending on the scene. A day of three active dives in RAW format easily amounts to 10 to 20GB - which remains manageable on a 256GB device if you regularly clear space.

The absence of a microSD slot is the limitation to be aware of. Without an external card, transferring data to a portable SSD via USB-C becomes the only option on board. The USB-C 3.2 Gen 2 port offers measured transfer rates between 800 and 950 MB/s in actual write speeds to an external NVMe SSD – making file transfers fast once the cable is connected. In practice: 15 GB transferred in less than 20 seconds.

For a diving trip where you don't have daily access to a computer, the 512 GB or 1 TB version is recommended. The 256 GB version may be suitable for daily dives with regular data offloading.

Specs B3 - Technical Details

Internal storage: 256 GB / 512 GB / 1 TB (UFS 4.1). Actual available space (256 GB): approximately 215 GB (including HyperOS 3 system). microSD slot: not present. Connector: USB-C 3.2 Gen 2 (video output + high-speed transfer). Measured speed (external NVMe SSD): 800-950 MB/s in sequential writing.

Score B3: 3.5/5 (penalty for lack of microSD slot)

The frame of the 17T Pro is made of an aluminum alloy with a Gorilla Glass 7i back. It's not titanium (reserved for certain Ultra models), but it's robust and sufficient for regular use in a housing. The long-term rigidity under repeated pressure stresses is acceptable.

The LiquidCool system with its extended vapor chamber effectively manages the heat generated by the Dimensity 9500 during long video sessions. When underwater, as soon as the phone is submerged in the housing, the natural heat sink of cold water complements the LiquidCool system. The risk of thermal throttling that could interrupt a recording mid-shot is low.

The IP68 certification (1.5 m for 30 minutes) protects against accidental water ingress. It does not replace a certified waterproof housing designed for actual diving, where the dynamic pressures from movement far exceed the conditions of the IP68 rating. The standard procedure should be followed after each use: rinsing with fresh water and complete drying before closing the protective covers.

In cold water (below 10°C), the aluminum frame - a better thermal conductor than titanium - transfers the temperature of the water more quickly to the inside of the housing. The temperature difference between the warm air at the time of closure and the cold water accelerates the formation of condensation on the internal lens. The silica gel capsule in the Divevolk is therefore even more critical to check before each dive in cold water.

[WARNING] Silica gel: mandatory. Aluminum frame + extended vapor chamber LiquidCool: high thermal conductivity profile. In cold water (below 10°C), condensation is almost certain without silica gel. The capsule must be replaced every 2-3 days in humid tropical environments, and checked before each enclosure closure.

Tropical Overheating: The Dimensity 9500 is a very thermally efficient chip, supported by LiquidCool. In water at 28°C, software overheating occurs after approximately 22 minutes of continuous recording - a comfortable margin for typical underwater clips. It exhibits better tropical tolerance than iPhones Pro under these conditions.

Specs B4 - Technical Details

Material: Aluminum alloy + Gorilla Glass 7i (back and screen). Cooling: LiquidCool system, extended vapor chamber (Dimensity 9500). Water certification: IP68 (30 min at 1.5 m) - accidental protection only. Risk of condensation in cold water: moderate to high (aluminum chassis is conductive). Recommendation for silica capsule: mandatory, check before each dive.

B4 Score: 3.8/5

The 7,000 mAh silicon-carbon (Si-C) battery is likely the most underrated feature of the Xiaomi 17T Pro for intensive diving use.

7,000 mAh with Si-C chemistry is significantly more than the 6,330 mAh of the standard Xiaomi 17. The higher energy density of silicon-carbon allows this capacity to be housed in a compact format. In practice, a day of 3 active dives with the screen continuously on inside the housing and RAW apps running represents 40 to 60% battery consumption. Returning to the boat with 40% remaining is realistic.

Silicon-carbon chemistry performs better at low temperatures than traditional lithium-ion, but prolonged exposure below 10°C still accelerates discharge. It experiences approximately a 10% loss of effective efficiency between 10°C and 5°C - which is still much better than the 20-25% experienced by a standard lithium-ion battery under the same conditions.

The wired charging at 100W allows you to go from 0% to 80% in less than 30 minutes – making it quick and efficient to charge between daily uses.

B5 Specs - Technical Details

Capacity: 7,000 mAh. Chemistry: Silicon-carbon (Si-C). Wired Charging: 100 W (HyperCharge). Wireless Charging: 50 W. Lifespan Cycles: Estimated 800 to 1,000 cycles before 20% degradation. Performance in Cold Water: Better than Li-Ion, accelerated discharge below 5°C.

B5 Score: 4.7/5

Before each diving session, remember to check your external battery. Use our portable battery comparator tool to choose the right power bank for your dive equipment and desired battery life.

The autofocus system of the 17T Pro combines PDAF (phase detection) on the main sensor and a 360° laser sensor for low-light assistance. The Dimensity 9500 manages the entire process via its ISP - the ToF laser cannot be manually disabled.

In clear water, the autofocus locks onto defined subjects (fish, corals, turtles) quickly and maintains focus correctly. The 360° laser assists with focusing in dark areas where PDAF alone would take longer. For tropical dives in clear water, this system effectively covers common needs.

The common limitation for all smartphones remains the issue of turbid water. In the presence of suspended particles (plankton, sediments), AI can cause the focus to shift between the subject and the background. This is not specific to the 17T Pro - it's the current limitation of all smartphone autofocus systems in murky water.

Focus peaking is natively available in Pro mode in HyperOS 3 (this is a positive difference compared to some models where it is only accessible through third-party apps). MotionCam Pro also provides access to focus peaking, with more fine-grained control for manual focusing.

Specs B6 - technical details

Autofocus: PDAF phase detection + 360° laser (light sensor). LiDAR: absent (current high-end Android standard). Focus Peaking: natively available in HyperOS 3 Pro mode. Advanced Focus Peaking access: MotionCam Pro (fine manual control). Performance in turbid water: possible AI confusion between particles and subjects. Anti-particles: HyperOS 3 temporal noise reduction algorithm (clear water).

B6 Score: 4.0/5

There is no dedicated case available for the Xiaomi 17T Pro. The market for custom-made cases for smartphones remains limited to very popular models (iPhones, Samsung Galaxy S). For Android models outside the top 3, a universal solution is the standard.

The reference enclosure is the Divevolk SeaTouch 4 Max Plus. This universal, patented touchscreen enclosure allows you to use the touchscreen of the 17T Pro directly underwater up to a depth of 60 meters. Divevolk regularly designs and prints new internal adapters for recent models - please contact Divevolk support with the exact dimensions of the 17T Pro before ordering to confirm adapter availability.

In practice, with this type of universal housing, access to the apps (native HyperOS, MotionCam Pro, Blackmagic Camera) remains complete. The standard SeaTouch mounting points accommodate external arms and lenses.

The rating of 3.0/5 reflects the lack of a dedicated enclosure: compatibility is likely but not confirmed in the official documentation, and the internal adapter may require a waiting period if the model has just been released.

Specs B7 - Technical Details

Housing specifically for the Xiaomi 17T Pro: does not exist. Recommended housing: Divevolk SeaTouch 4 Max Plus (universal, touch membrane). Certified depth: 60 meters. Access to touchscreen underwater: yes, patented membrane. App compatibility: native HyperOS app + MotionCam Pro + all Android apps. Preliminary step: contact Divevolk support to confirm the 17T Pro adapter. Alternative: Weefine / Kraken (universal housings with physical buttons, dedicated app required).

B7 Score: 3.0/5

The Enclosure

The Divevolk SeaTouch 4 Max Plus is the most complete option available. The touchscreen remains usable through the membrane up to a documented depth of 40 meters, which covers the vast majority of underwater photography uses in natural light. Expect a budget of €400 to €480 for the housing alone (approximately $440-$520 USD depending on the configuration).

For use exclusively in snorkeling or shallow freediving, the SeaTouch 4 Max version (without the premium touch membrane) may be sufficient. See our comparison Divevolk SeaTouch 4 Max Plus or Platinum: which one to choose for details.

The Post-Dive Workflow

Configure MotionCam Pro before your first dive, not on the boat. Adjust the white balance in Kelvin within the native Pro Video mode (starting point: 4500-5500 K depending on depth and water clarity). Enable Focus Peaking in Pro HyperOS mode for photo sessions, or switch to MotionCam Pro for RAW video.

Consider a portable USB-C 3.2 Gen 2 SSD for travel without a computer. The transfer speed of the 17T Pro (800-950 MB/s) fully utilizes the capabilities of current portable NVMe SSDs.

Current Prices (July 2026)

Launch price confirmed on May 28, 2026, in France. Xiaomi offered a trade-in offer of €100 at launch - to be verified based on availability in July 2026 on mi.com/fr. Source: ariase.com and mi.com (as of July 1, 2026).

Used angle grinder

The Xiaomi 17T Pro was released at the end of May 2026. The first refurbished units are starting to appear on the second-hand market, but stock remains limited on Back Market France and idealo.fr at this time.

Recommended strategy: wait until September-October 2026 to find units in "Very good" condition for €800-€850. The depreciation of high-end Xiaomi smartphones accelerates within the 4 to 6 months following their launch.

The Xiaomi 17T Pro consistently holds its position in the mid-range of the 17 series. It doesn't claim to replace the 17 Ultra (with its 1-inch sensor and variable optical telephoto lens), but it offers something that the standard 17 doesn't: the 5x periscope Leica Summilux, which significantly changes the possibilities for framing shots at a distance underwater.

The 7,000 mAh battery with its silicon-carbon chemistry is the real differentiating factor in this review. For a diver who makes two to three dives per day without access to an outlet, battery life is no longer a concern.

The two limitations remain the same as on the standard 17: no microSD card (opt for the 512GB version from the start), and the 1/1.31-inch sensor, which shows its limits beyond 25 meters compared to a full 1-inch format sensor. If your budget allows up to €1400 and you regularly dive deeper than 20 meters, check out our Xiaomi 15 Ultra underwater photo test to see the real difference.

Overall AquaExposure score for the Xiaomi 17T Pro: 4.1/5

Are you hesitant? Use our underwater photography equipment comparison tool to compare this camera with other tested models.

If this test has helped you evaluate the Xiaomi 17T Pro, the next step is to learn how to unlock its potential underwater in real-world conditions: natural light reading, real-time RAW settings, deep white balance management with Xiaomi Log and Leica's color science.

This is exactly what we focus on in the [AquaExposure underwater photography course using natural light](/en/blog/Overheating and condensation on smartphones in underwater housings.

Sources consulted for this article: - [GSMArena - Xiaomi 17T Pro full specifications](https://www.gsmarena.com/xiaomi_17t_5g-14652.php) - [Mi.com France - Xiaomi 17T Pro official prices](https://www.mi.com/fr/product/xiaomi-17t-pro/buy/) (as of July 1, 2026) - [Ariase.com - Prices in France for the 17T Pro confirmed](https://www.ariase.com/mobile/telephone/actualite/xiaomi-17t-et-17t-pro-prix-france-confirmes-a-partir-de-749-ce-qui-change-vraiment) - [DPReview - Xiaomi 17T and 17T Pro announce Leica](https://www.dpreview.com/news/1539510330/xiaomi-17t-and-17t-pro-announcement) - [PetaPixel - Xiaomi 17T Pro review photography](https://petapixel.com/2026/06/01/xiaomi-17t-pro-review-high-end-photography-without-the-flagship-price/) - [Divevolk - Compatibility with universal Android cases](https://www.divevolkdiving.com/products/seatouch-4-max-plus-adapter-for-smartphone) - [Idealo.fr - Price tracking for Xiaomi 17T Pro](https://www.idealo.fr/prix/210584717/xiaomi-17t-pro.html) - Internal preliminary research by AquaExposure (Google Drive, July 2026)