Unlike the other Sigma lenses released for the Fujifilm X-mount, the Sigma 100-400mm is a full-frame lens adapted to the Fujifilm X-mount. The lens offers a cheaper alternative to the XF100-400mm with a slightly slower max aperture at both ends of the focal range.
100–400mm
24.4–6.2º
f/5
9
67mm
110cm
0.24x
Fujifilm incorporates three primary autofocus motor types in their lenses: the ultra-fast and nearly silent Linear Motor (LM), stepping motor (STM) known for its fast and quiet operation, and DC coreless motor with fast but noisier autofocus.
Optical image stabilisation (OIS) minimizes the effects of horizontal or vertical camera shake using gyroscopic sensors that calculate the movement thousands of times per second. OIS is rated in stops with each stop theoretically allowing a doubling of the shutter duration whilst not incurring any camera shake.
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