Description
Sigma 100-400mm F5-6.3 DG DN OS Contemporary Lens For Fuji X Mount
Introducing the Sigma 100-400 Fuji lens, a remarkable addition to the FUJIFILM X Mount lineup. This ultra-telephoto zoom lens seamlessly blends outstanding optical performance and practicality, all housed within a compact, lightweight build. It’s the go-to choice for photographers who are always on the move, particularly those capturing travel and action scenes.
The Sigma 100-400 Fuji lens, designed exclusively for Fujifilm X Mount cameras, comes with exclusive features not found in the L-Mount and Sony E-mount versions. Notably, it boasts an innovative AF Function Setting switch and AF Function button. While preserving the same top-tier FLD and SLD glass components, ensuring sharpness throughout the entire frame and zoom range, it also includes a two-mode optical stabilizer, a focus limiter switch, and a dual action zoom. With a versatile focal range of 100mm to 400mm and a 1:4.1 magnification ratio, this lens proves its adaptability across diverse photography genres, including wildlife, sports, close-ups, and portraits.
The Sigma 100-400 Fuji lens harnesses the power of high-quality SLD and FLD glass elements, guaranteeing consistently sharp images across the entire zoom spectrum. Additionally, the front element is treated with SIGMA’s Super Multi-Layer Coating, effectively minimizing undesired flare and ghosting. Weighing only 1135g and sporting a compact design brimming with features, it’s the ideal choice for travelers and photographers who prioritize lightweight gear.
New AF Focus button and AF Focus Switch
Due to differences in camera software, the lens features a new AF Function Setting switch and AF Function button, replacing the AF/MF Switch and AFL buttons found on the L-Mount and Sony E-mount. The switch can be toggled to change the function of the button between AF Lock and AF activation on the fly.
Shoot fast paced action and close-up macro
The Sigma 100-400mm F5-6.3 DG DN OS | Contemporary, supports dual action zoom. The lens can be zoomed in, or out, by turning the zoom ring for precise control, or by pushing and pulling the lens hood to quickly react to fast, paced action. Set the AF Limiter switch on the side of the, lens to control the focus range, to reduce lens hunting when shooting busy scenes and when subjects are a set distance away. Macro and portrait photographers can take advantage of the 1:4.1 magnification ratio and 160cm minimum focus distance at 400mm to capture close-up images with creative background compression.
Improved Optical Stabilisation with this 100-400 Fuji Fit
As the lens has been optimised for Fuji cameras, the stabilisation effect has increased from four to fivestops. This can allow users to shoot in lower light conditions with slower shutter speeds, with improved results.
Other features
The effective focal range of the lens is increased to 150-600mm when shooting on APS-C sensors. Ideal for capturing distant subjects without adding extra accessories.
- Lens construction 22 elements in 16 groups (4 SLD, 1 FLD)
- OS (Optical Stabiliser) function (5 steps)
- Inner focus system
- Compatible with high-speed autofocus
- Support DMF and AF+MF
- AF Function button
- Focus Limiter switch
- AF Function Setting switch
- OS switch
- Zoom Lock switch
- Mount with Dust and Splash Resistant Structure
- Tripod Socket (TS-111) (optional)
- Designed to minimise flare and ghosting
- Every single lens undergoes SIGMA’s proprietary MTF measuring system
- 9-blade rounded diaphragm
- High-precision, durable brass bayonet mount
- Made in Japan craftsmanship
In The Box:
- Lens Hood LH770-05
- Front Cap LCF-67mm III
- PROTECTIVE COVER PT-31
- Allen Key
- Rear Cap LCR II
Samples images using the Sigma 100-400 Fuji Lens

























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