Along with the Fuji X-E4, Fujifilm has also announced the Fuji GFX 100S, which is technologically and ideally based on the GFX100 but is hardly larger than the GFX 50S or a full-frame mirrorless camera. It weighs only 900 grams, is equipped with a 102 Mpx sensor, also with a 5-axis image stabilization (IBIS) with up to 6 f-stops and fast and precise autofocus.
Powered by Fujifilm’s quad-core X processor 4 CPU, the GFX 100S uses a backlit CMOS sensor with 102-megapixel resolution. This measures 55 mm in the diagonal (43.8 x 32.9 mm) and thus offers approximately 1.7 times the area of a full-format sensor 36 x 24 mm. In addition, the dynamic range, true-to-life color rendering, and high-ISO performance of the GFX100S are said to have been improved.
With the Fujifilm GFX 100S, 19 exclusive Fujifilm film simulation modes are available so that you can creatively define the colors during the recording and thus develop your own style. The new film simulation “Nostalgic Neg”, which is based on the American New Color Photography of the 1970s, stands out. Their tonality adds an amber tone to the lights to make them look softer.
With the new Fuji GFX 100S, the on-sensor phase-detection pixels cover almost 100% of the image sensor and thus enable significantly faster and more precise autofocus performance. According to Fujifilm, the camera can focus in just 0.18 seconds, even at a brightness of -5.5 EV (measured with the Fujinon GF 80mm F1.7 R WR lens), which makes it versatile, precise, and fast. With the X Processor 4, the camera is also able to efficiently use an updated focus tracking algorithm to keep subjects in focus when using the Tracking AF and Face / Eye AF functions.
The GFX 100S has a newly developed in-body image stabilization system (IBIS) that significantly expands the possibilities of free-hand photography in low light. Compared to the unit in the Fujifilm GFX100, the IBIS mechanism inside the GFX 100S is 20% smaller and 10% lighter. Despite this reduction, the five-axis system offers CIPA-certified image stabilization of 6 f-stops – an improvement of 0.5 f-stops compared to the GFX100.
With a weight of 900 grams and dimensions of 15 cm in width, 10.4 cm in height, and 8.7 cm in-depth, the housing of the Fuji GFX 100S can be compared with the dimensions of many full-frame cameras. Despite its compact size, it is equipped with powerful image stabilization and a 102 MP image sensor that is almost twice as large as a typical full-frame sensor.
The GFX100S has a newly designed lock and a massively reduced IBIS unit compared to the GFX100. The result is a camera housing that is approx. 6 cm shorter and 500 g lighter than that of the GFX100, but according to Fujifilm offers the same level of photo and video performance despite the smaller size. The smaller size of the GFX 100S is compensated for by a very sturdy handle that feels comfortable in the hand and makes it easier to hold the camera even for longer periods of time.
The GFX 100S is designed for operation at temperatures down to -10 ° C and is dust and moisture resistant. The housing is made of a magnesium alloy and is 1 mm thicker than the GFX100 in the area of the lens connection, which offers additional support for larger G-mount lenses.
The GFX100S has classic controls from the GFX system. The PASM dial with six programmable options offers quick and direct access to frequently used settings, while a switch next to the mode dial enables quick switching between photo and film mode. An ergonomic update of the focus lever makes the selection of the focus point easy and fluid.
The camera has a 3.2-inch LCD monitor on the back and a 1.8-inch sub-LCD monitor on the top, which can be set to have important EXIF settings – such as shutter speed, aperture, ISO sensitivity, and exposure compensation – displays and shows the status of important functions or the available memory capacity. The 3.2-inch, touch-sensitive LCD display is a 2.36 million-point monitor with 100% coverage that can be tilted in three directions (90 ° up, 45 ° down, and 60 ° to the right).
With its large-format image sensor, the GFX 100S is able to record cinema-grade 4K / 30p films with excellent high ISO performance, a wide range of tonal values, and high overall image quality. The film material can be recorded at bit rates of 400 Mbps in various quality levels, from 10-bit 4: 2: 0 F-log internally on an SD card and 10-bit 4: 2: 2 video and 12-bit RAW via HDMI.
In addition to the ability to record 4k material in 16: 9 aspect ratio, the Fuji GFX 100S also supports the 17: 9 aspect ratio often used in digital cinema. The most commonly used compression codecs like H.264 and H.265 are also available. In addition, professional standards such as the REC.2100 supported Hybrid Gamma Log (HLG) or F-Log can be selected for complete creative control. Compared to using common compression codecs such as H.264, recording footage in F-Log or HLG filmmakers offers much more flexibility in post-production when the material is brought through the editing and color correction process and making adjustments to luminance, color saturation or other image attributes will.
For maximum flexibility in image-based adjustments and color corrections, the GFX100S can also record 4K / 30P material in 12-bit RAW via HDMI directly to an Atomos Ninja V monitor recorder and save it as Apple ProRes RAW files. In this way, all decisions about the image can be made in post-production after production, free from in-camera processing. The simultaneous output of RAW material and material in F-Log or Hybrid Log-Gamma (HLG) with an applied film simulation mode is also possible.