Vivo X300 Ultra underwater photography test: our rating for 2026.

To learn how to get the most out of your gear underwater, discover the [AquaExposure Training](/lms). --- ## A game-changing partnership with Zeiss for underwater applications.

A few years ago, the idea of a smartphone being the primary tool for underwater photography in natural light would have made diving photographers smile. Today, top-of-the-line Android phones are achieving optical performance levels that challenge this certainty.

The Vivo X300 Ultra arrives in this context with an unusual feature: a hardware and colorimetric partnership with Zeiss, not just a logo placed on the optics. It features a T* anti-reflective coating, "Zeiss Natural Color" color profiles, and a 12-channel spectral sensor. This type of technology is important for underwater photography in natural light, where colors degrade after only a few meters.

This article follows our B1-B7 scoring methodology, applied to all smartphones in our 2026 comparison. For the previous generation's context, see our review of the Vivo X200 Ultra.

Designed for: Traveling divers who want a single device capable of covering both underwater photography in natural light and everyday use on the surface. Video users seeking a serious codec without a dedicated housing.

Not ideal for: divers who already have a dedicated housing for their mirrorless or high-end compact camera. Those on a tight budget (the X300 Ultra is a flagship product and costs almost €2,000).

Score: 4.5 / 5

The X300 Ultra's triple module is designed around large sensors for each focal length. The main sensor is a Sony LYTIA-901 with a 1/1.12-inch size and 200 MP, equivalent to a 35mm focal length, f/1.9 aperture, with Gimbal OIS (CIPA 7.0). The ultra-wide angle lens at 14mm features a 1/1.28-inch sensor with 50 MP. The periscope telephoto lens at 85mm uses a Samsung HP9 sensor with 200 MP, f/2.7 aperture, and 3-axis OIS stabilization.

The Zeiss T* coating reduces reflections and veiling glare, two major problems in underwater photography when shooting against the light. The 12-channel spectral sensor helps with white balance in mixed color temperatures encountered underwater.

The 85mm lens, with a minimum working distance of 12-15cm, offers a magnification ratio of 3.4:1. This is a real advantage for underwater macro photography without additional optics.

Score: 4.5 / 5

The X300 Ultra natively outputs DNG 14-bit files on both the main and telephoto modules (12.5 MP, 50 MP, or 200 MP depending on the need). The white balance can be locked in Kelvin within the native Pro mode, which is essential for maintaining consistent colorimetry between two dives under the same conditions.

Android with full GMS means MotionCam Pro is available. This application unlocks RAW video in "Open Gate" mode and utilizes DCG (Dual Conversion Gain) technology, which the native app does not exploit. In terms of codecs, the X300 Ultra can record up to 4K at 120 fps in 10-bit Log format (Vivo Log or APV Log, up to 2000 Mbps). This means that color correction in post-production starts from a solid foundation.

Zeiss Natural Color is not simply a filter applied as a JPEG. It's a rendering profile integrated into the processing chain, making it a credible starting point for serious calibration in natural light.

Score: 4.0 / 5

Three configurations are available: 256 GB, 512 GB, and 1 TB using UFS 4.1. There is no microSD card slot, which means you need to choose the right version upfront. Approximately 25 to 30 GB will be reserved by the operating system.

The USB-C 3.2 Gen 1 connection has a theoretical maximum speed of 5 Gbps (approximately 500 MB/s in read speed). This is sufficient for fast transfer to an external SSD after the dive, although Gen 2 would have been more comfortable for long APV video sessions.

For two to three dives per day in RAW format (200MP) and 10-bit Log video, 512GB is the comfortable minimum. 1TB is recommended for diving trips lasting more than a week.

Score: 4.5 / 5

The aluminum chassis with a glass back incorporates a multi-layer vapor chamber. Stress tests of the GPU (3DMark) show 97% consistency over 20 consecutive minutes, which is excellent for a smartphone.

In diving conditions, the heat generated by continuous 4K recording in a waterproof housing poses a real risk to less well-designed devices. The thermal management of the X300 Ultra is among the best on the market in 2026.

[WARNING] Silica gel: mandatory. Aluminum frame + multi-layer vapor chamber: this combination poses the same risk as Xiaomi 17 and Vivo X200 Ultra models. Condensation is possible below 15°C without silica gel. The dual IP68/IP69 certification does not change this physical phenomenon.

Tropical Overheating: The Dimensity 9400+ is one of the most thermally efficient chips in this comparison. In water at 28°C, software overheating occurs after approximately 22 minutes of continuous 4K recording. This provides a comfortable margin for standard underwater clips.

The dual IP68 and IP69 certifications indicate robust water resistance against pressure and high-pressure jets. This is not a substitute for an enclosure, but it provides a valuable safety net on the surface.

Score: 4.5 / 5

The 6,600 mAh silicon-carbon battery will be one of the largest in the flagship segment by 2026. The Si/C chemistry is theoretically more resistant to low temperatures than conventional Li-Ion batteries, which is an advantage for dives in cold water (below 15°C).

The wired fast charging at 100W and wireless charging at 40W allows for a full recharge in less than an hour between uses. The documented 1,200 cycles before the battery capacity drops to 80% promise long-lasting performance over multiple seasons.

On a day of two dives with active video recording, the X300 Ultra performed flawlessly. This is rarely the case for flagship Android phones with more modest batteries.

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.

Score: 4.0 / 5

The AF system combines Dual Pixel PDAF on the ultra-wide lens, multi-directional PDAF on the telephoto lens, laser AF, and a colorimetric spectral sensor. The calculations are performed at 60Hz, which provides smooth tracking of moving subjects.

The focus peaking feature is not available in the native application, a drawback noted by macro photographers. However, it is available through MotionCam Pro. No specific anti-backscatter algorithms are documented to date.

With the 85mm telephoto lens at a distance of 12-15 cm, nudibranchs and small crustaceans remain within reach. The AF laser helps in low light conditions where a PDAF system alone might struggle.

Score: 3.5 / 5

There is no dedicated underwater housing from a manufacturer specializing in underwater photography, which is expected for a mainstream flagship product. The Vivo X300 Ultra is compatible with the Divevolk SeaTouch 4 Max Platinum V2, certified to 60 meters.

The patented Divevolk gel touch membrane allows full access to the capacitive screen underwater, including the complex interface of MotionCam Pro. This is a decisive advantage over housings with Bluetooth buttons, which are limited to native APIs.

The Platinum V2 is the correct version to order for the X300 Ultra, not the Max Plus (which has dimensions that are incompatible with the 233g chassis of the X300 Ultra). Please verify the exact dimensions of your regional variant before ordering.

The Housing (Divevolk SeaTouch 4 Max Platinum V2)

The Divevolk SeaTouch 4 Max Platinum V2 is the solution recommended by Divevolk for the X300 Ultra. Certified to a depth of 60 meters, it features a touch membrane that allows access to the screen underwater and enables unrestricted use of MotionCam Pro. The cost of the housing is approximately $479 (approximately €440-€460 depending on the exchange rate at the time of purchase). This amount should be added to the total budget before making any decisions.

To compare the available Divevolk options, see our article Divevolk SeaTouch 4 Max vs Platinum: which one to choose.

The Post-Dive Workflow

14-bit DNG files at 200 MP generate large file sizes. Plan for an external USB-C SSD (ideally USB 3.2 Gen 2 for fast speeds) and software capable of natively opening Vivo DNG files. Lightroom Mobile or Lightroom Classic work well. Color correction in natural underwater light starts with the Zeiss Natural Color Profiles available for compatible third-party applications.

For video, the APV Log codec at 2000 Mbps requires a recent computer for color grading. 4K 120fps 10-bit files are demanding. Plan on having a minimum of a 2TB SSD for a week's worth of footage.

Current Prices (July 2026)

New (global version 16 GB / 1 TB): - Amazon.de: approximately €1,999 (price observed in July 2026, source GSMArena and NotebookCheck) - Fnac France: listed, availability varies depending on import stock levels (verified in July 2026 on fnac.com) - vivo-official.com: pre-orders are closed, direct purchase available subject to stock availability.

Occasion: - Back Market France: The X300 Ultra was released in early 2026, so refurbished units are still scarce as of the summer of 2026. Monitor the Vivo category on backmarket.fr for initial listings. - Idéalo.fr: A useful aggregator for comparing merchants in real time.

Used angle grinder

The X300 Ultra is too recent for a structured second-hand market in July 2026. If budget is a major constraint, the Vivo X200 Ultra is starting to appear on the refurbished market at significantly lower prices, with similar Zeiss optics and a comparable score in the areas that matter most.

The Vivo X300 Ultra receives a score of 4.32/5 in our underwater scoring system. This is one of the highest scores we have given to an Android smartphone in 2026.

What sets it apart isn't a single exceptional feature, but rather a rare level of consistency: Zeiss optics on three focal lengths, including a true full-frame 35mm lens, native 14-bit RAW support, and the MotionCam Pro feature in operation, a robust design, and sufficient battery life for a day of intense diving.

The limitations are known: no dedicated subwoofer, focus peaking is absent from the native application, and USB-C Gen 1 is slower than expected. Nothing critical, but these drawbacks should be weighed against a price that approaches 2,000 euros without the subwoofer.

For a diver looking for a compact, versatile system that can produce high-quality images in natural light, this is currently one of the most reliable options on the Android market.

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

To learn more about condensation and overheating, read our dedicated article: Overheating and condensation on smartphones in underwater housings.

The best optics cannot replace proper underwater lighting techniques. Our training programs cover natural light techniques, settings in real-world conditions, and the post-dive workflow.

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