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Fujifilm GFX100: large sensor, small body

Fujifilm’s GFX100 mirrorless medium-format camera, with a 102-megapixel 55mm sensor, will be available from late June for $16,499.
Fujifilm says the camera boasts numerous ‘world’s firsts’ – the highest megapixel count for a mirrorless system; first five-axis IBIS, and 4K 30P video, in a sensor larger than 35mm format.

The 55mm diagonal back-illuminated sensor structure allows a greater amount of light to enter with improved noise performance. It also includes 3.76 million phase detection pixels, another first for large format cameras, which covers 100 percent surface coverage to enable fast and accurate AF.

‘This sets a new standard in AF speed and precision for large format cameras performing Single Point, Zone and Wide Tracking AF,’ Fujifilm says. ‘When using a prime lens with a heavy set of focus lens elements, the GFX100 achieves a speed improvement of up to 210 percent over a regular AF system.’

The five-axis IBIS system offers 5.5 stops of image stabilisation, with the GF63mmF2.8 R W, and has a sensor shift mechanism ensures images are stable against pitch, yaw, and shift and roll movements. The shutter is suspended with four springs to minimise the effect of shutter shock, broadening the scope of handheld shooting.

The GFX100 sports the same detachable EVF system of the GFX50S, which can be adjusted using the EVF Tilting Adapter EVF-TL1. Fujifilm developed the EVF unit with the, wait for it, ‘world’s highest resolution 5.76 million dot OLED panel’. The viewfinder has a magnification of .86x and contains five optical glass elements including aspherical elements.

EVF can be set to Frame Rate Priority, Resolution Priority, or AF Speed Priority mode based on the subject characteristics.

Fujifilm says recording at 4K 30P (10bit 4:2:2 externally and 10bit 4:2:0 internally), when using a standard 17:9 cinema format, makes it easy to shoot high quality video with shallow depth of field, wide tonal range and high ISO sensitivity.

‘The GFX100 uses oversampling with data equivalent to approx. 50.5 megapixels to render video. It also supports the highly efficient H.265/HEVC codec, as well as “F-Log” which has a gamma curve with a wide dynamic range and the “Hybrid Log Gamma (HLG)” for recording HDR footage with ease. The GFX100 is also the first model in the GFX System to incorporate the “ETERNA” cinema film situation mode.’

The large sensor is packaged inside a body equivalent to the size and weight of a 35mm full-frame DSLR – 1.3KG. To put it in perspective, the GFX100 is lighter and smaller than a Canon 1Dx Mk II (1.5KG) and Nikon D5 (1.4KG).

Other features include:
– An integrated vertical grip;
– Fourth generation X-Processor 4 engine that supports 16-bit RAW mode;
– Weather sealing in 95 locations;
– Three-direction tiltable rear panel monitor featuring a 3.2 inch and 2.36 million dot touchscreen LCD.
– 1.8-inch LCD monitor on the top panel, and 2.05-inch sub-monitor on rear panel;
– ‘Virtual Dial Mode’ displayed on the top panel;
– improvemed Face and Eye Detection AF accuracy;
– 16-bit TIFF in-camera file conversion, Film Simulation modes; and a Smooth Skin Effect function.
– 800 frames per battery charge.

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