Fujifilm X-T4 Underwater Housing by Nauticam

The X-T4, Fujifilm's latest APS-C mirrorless hybrid camera, adds a list of significant upgrades when compared to its predecessors.  Some of the most noticeable improvements are in-body stabilization, battery life, and auto focus tracking performance. As still/video hybrids become more popular, Fuji is offering a 26MP, high-resolution electronic viewfinder camera that can record internal 10 bit 4:2:0 H.265 DCI/UHD 4K video or 4:2:2 over HDMI as well as shooting an impressive 20fps of continuous stills.

FUJIFILM X-T4

The Fujifilm X-T4 features an APS-C CMOS 4 X-Trans 26.1MP Sensor. The X-T4 is powered by a proven X Processor 4 which provides fast performance and improved responsiveness. Newly added in-body stabilization delivers up to a 6.5EV benefit which is a significant addition for video shooters.  The improved autofocus tracking system now considers color and shape as well as distance information, providing a noticeable improvement over the X-T3.  

Oversampled DCI or UHD 4K (using full sensor width) is possible at 30p whereas 60p can be recorded with a minor 1.18x crop. The 60p footage can be captured as 10 bit 4:2:0 H.265 at 200 Mbps and recorded internally. This increases to 4:2:2 when output over HDMI. The X-T4 also features F-Log capture to maximize dynamic range, protecting highlights and shadows for editing. New to the X-T4 is F-Log View Assist which applies a gamma correction to the EVF and LCD, helping to visualize the end result.  Zebra warnings and focus peaking overlays as well as magnification during shooting are all features that video shooters will appreciate. Multiple custom white balance slots along with presets are easily accessible.  

Key Camera Specifications

• 26MP BSI 'X-Trans CMOS 4' sensor
• In-body image stabilization up to 6.5 EV benefit
• 20 fps shooting with AF (15 fps with mechanical shutter)
• 3.68M-dot electronic viewfinder
• 10 bit 4:2:0 H.265 internal video capture (4:2:2 over HDMI)
• UHD/DCI 4K/60p from 1.18x crop region
• UHD/DCI 4K/30p using full width of sensor
• Internal F-Log capture
• Dual UHS-II SD card slots
• USB C-type connector can be used for charging battery
• New NP-W235 battery

THE NAUTICAM NA-XT4 UNDERWATER HOUSING

Nauticam has supported X-T1, X-T2, XH-1 and XT-3 cameras and continues to create innovative and ultra-functional housings for this line with the NA-XT4. More than just an updated badge, the NA-XT4 is redesigned and considerably smaller than its NA-XT3 predecessor.  The NA-XT4 features DSLR-style housing and port lock mechanisms as well as integrated ergonomic handles. The housing is designed with our Mission Control concept of placing the most important camera controls as close to the handles as possible to facilitate effortless and quick camera operation to ensure you don't miss the shot.

The NA-XT4 features thumb levers near both handles, with the left thumb lever actuating the playback function and the right thumb lever the AF-ON control. The housing includes two M14 and one M24 bulkhead openings to accommodate a variety of accessories.

The NA-XT4 uses the N100 Port System shared with the Fujifilm XH1 and XT3 system. A selection of port options are available for a variety of lenses.

VIDEO RECORDING FEATURES

The impressive video specs of the X-T4 prompted the addition of some video-centric features to the NA-XT4. The base of the housing can accept Nauticam's Mounting Ball Set for Tripod (PN 25218).

As the X-T4 can output DCI/UHD 4K at 60p with 4:2:2 quality over HDMI, a new M24 bulkhead has been incorporated into the housing to support an HDMI 2.0 connection to the Nauticam Atomos Ninja V housing (HDMI 2.0) for Atomos Ninja V 5” 4Kp60 4:4:2 10-bit Recorder/Monitor/Player (NA17922).  An M24 Adaptor for HDMI 2.0 Cable (NA25086) is required when using the Nauticam Ninja V housing.  

FLASH TRIGGERING

Reliable automatic flash exposure is available with the NA-XT4 and a variety of optically fired flashes, precisely reproducing the Fujifilm EF-X8 flash at a proportionally greater intensity. This system yields accurate automatic TTL flash performance – even in manual exposure mode – with no electrical sync cables to flood!

The NA-XT4 is also compatible with the Nauticam Mini Flash Trigger for Panasonic/Fujifilm (NA26305). The Flash Trigger allows for rapid fire manual flash firing via fiber optic, with no camera battery drain.

The NA-XT4 comes fiber optic ready and accepts standard Sea & Sea style bushing connections. Nauticam Universal fiber optic cable system (NA26216) for Inon, Sea&Sea strobes, provide exceptional light transmission for accurate TTL performance.

INTEGRATED VACUUM CHECK AND LEAK DETECTION SYSTEM

The Nauticam vacuum check and leak detection system is pre-installed in the NA-XT4 as standard equipment. Combined with an optional M14 Vacuum Valve II (NA25624), this monitoring system provides constant updates throughout the dive as to watertight integrity of the housing via a multi-color LED on the rear of the housing.