GFX is Fuji’s mirrorless medium format digital camera system. GFX cameras have the Fujifilm G-mount. The mount’s inner diameter is 65mm and the flange focal distance is 26.7mm. The sensor size is 43.8×32.9mm, which is about 1.7 times larger than a 35mm full-frame sensor. The lens line in production is still very limited but thanks to the short flange distance and focal plane shutter many lenses from other systems are adaptable to Fuji GFX.