With the GFX100S, Fujifilm has transferred the power of the larger medium-format GFX100 into a smaller camera body that is more in line with a standard mirrorless full-frame cameras while also making various performance improvements.  The GFX100S maintains the 102MP BSI CMOS sensor yet features a smaller and lighter in-body image stabilization system, autofocus points that cover virtually 100% of the image frame and is powered by the X-Processor 4 chip. THE FUJIFILM GFX100S CAMERA Fujifilm's mirrorless medium-format (44mm x33mm sensor size) GFX100S camera packs the expected large 102MP pixel count into a camera body more in-line with a full-frame mirrorless system.  Even while reducing overall camera size, the GFX100S receives a more capable in-body image stabilization (IBIS) system as well as supercharged autofocus driven by the latest X-Processor 4 chip.  Key Camera Specs 102MP BSI CMOS Sensor (44mm x 33mm) IBIS rated at 6EV 4K 30p video at up to 400Mbps with full-width readout Uncompressed 10-bit 4:2:2 or 16-but raw video output over HDMI Dual-gain ISO Up to 16-bit uncompressed raw files The GF-mount lens lineup continues to grow, with more and more lenses meeting the criteria underwater image-makers are after.  Paired with the camera's medium-format 102MP sensor, which is 68% larger than a full-frame sensor, the resulting images have lower noise and greater dynamic range for a given exposure value.  Users can choose to record up to 16-bit uncompressed raw image files, preserving the maximum amount of sensor data for post-processing. The GFX100S features the latest X-Processor 4 chip which powers the improved autofocus system that covers virtually 100% of the image area.  The camera's large built-in OLED viewfinder has 3.69M-dot resolution at 0.77x magnifications and features variable refresh rates and resolution to enhance battery life. Video from the GFX100S uses the full sensor width, preserving the original field-of-view of the lens and can be recorded internally as 4K 30p video with a bit-rate of up to 400Mbps.  Over HDMI the GFX100S can output either an uncompressed 16-bit raw or 10-bit 4:2:2 4K video signal, excellent news for those using external monitors/recorders such as the Atomos Ninja V.   With dedicated settings for both still or video modes, switching between shooting modes is quick and easy via a lever atop the camera.  The camera's "Q" menu can be customized to provide the most valuable information as either an overlay on the live-view representation or as the entire LCD area.   The Nauticam NA-GFX100S Underwater Housing  The NA-GFX100S is built with the singular focus of creating an underwater housing that blends ergonomic design, intuitive control placement and rugged field-tested durability.  The resulting machined aluminum housing can be further refined with the addition of accessories from magnifying viewfinders to external monitors/recorders.  To achieve the full benefit of the stunning 102MP resolution requires the use of underwater optics that are designed with high-resolution lenses in mind to deliver the highest optical quality possible.   Mission Control Design The NA-GFX100S is designed with our Mission Control philosophy which dictates placing controls where they are needed most, meaning no more missed shots fumbling for a control or dial.  The majority of exposure and focus controls are within easy reach of the ergonomic handles that feature stainless steel stiffening brackets to reduce any unwanted movement even when using large strobes or video lights.  A multi-direction pad on the upper right of the rear panel gives access to the camera's joystick.  A double lever near the right handle activates the 'AF-ON' and 'Q' controls.  Also on the right side are levers for Focus and View modes.  The left side has a double lever for 'PLAYBACK' and 'DISP' as as levers for turning the EF-X20 TTL flash on or off and one for the cameras 'V-Fn4' control.  On top of the housing is a lever for switching between 'STILL' and 'VIDEO' modes. Premium Professional Optics Built around the N120 Port System, the NA-GFX100S supports a variety of GF-mount lenses with a selection of optical-quality glass and acrylic ports as well as access to Nauticam's lineup of premium professional optics.  These optics are designed suing industrial lens design software to provide unparalleled optical quality and impressive fields-of-view.  The Wide-Angle Conversion Port 2 or WACP2, when used with the Laowa 17mm f/4 GFX Zero-D lens can achieve an impressive 140º FOV with an almost 0" minimum focus distance and incredible corner sharpness even at wider-open apertures such as f/5.6.   Flash Triggering Flash triggering is via the optional Fujifilm EF-X20 TTL flash and built-in fiber-optic bulkheads.  An option for electronic strobe connection without TTL is also possible using the optional M14 Nikonos bulkhead with universal hot-shoe.   HDMI Output The GFX100S can output high-quality uncompressed 4K video over HDMI and the NA-GFX100S is compatible the Nauticam HDMI 2.0 system via the front M24 bulkhead. Even when recording video internally, the use of an external monitor over either HDMI 1.4 or 2.0 is a great tool to help with composition or image review.  Vacuum Check and Leak Detection System The NA-GFX100S comes with the Nauticam vacuum check and leak detection system as standard equipment. This monitoring system, working in tandem with the pre-installed vacuum valve, provides constant updates on the water tight and safe-to-dive status of the housing. A simple color coded LED lighting system lets the user know that the vacuum is solid, or that the housing is losing vacuum. Leak detection is built into the same circuit, so if there is water intrusion, an audible and visual indication will occur. The Nauticam system is temperature compensated, eliminating false alarms caused by a change in outside temperature, or from a camera heating up on an action packed dive.

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.