Overview
Sigma AF 12MM F/1.4 DC I C – Fuji X Mount offers effortless shooting for both stills and video, providing creativity and colour to everyday moments with superb image quality and mobility. This ultra-wide F1.4 lens achieves the widest angle of view of 12mm among all F1.4 lenses for APS-C cameras currently available. The lens delivers high resolution and captures vast starry skies and landscapes with exquisite detail, while maintaining uncompromising performance in a compact and lightweight design that maximizes the mobility of APS-C cameras.
The lens features powerful visual expression enabled by superior optical performance, combining an ultra-wide angle and F1.4 aperture. It offers outstanding optical performance across the entire image, with three double-sided aspherical lenses and two SLD glass elements effectively arranged to achieve high optical performance. The lens is designed for comfortable shooting of both stills and video, with smooth, responsive autofocus powered by a stepping motor and minimal focus breathing. Additionally, the lens is dust- and splash-resistant, making it suitable for use in harsh outdoor environments.
Summary
Focal Length: 12mm
Lens Mount: Fujifilm X Mount
Filter Thread: 62mm
Included in box
AF 12MM F/1.4 DC I C – Fuji X Mount
Pouch
Lens Hood LH652-01
Front Cap LCF-62 IV
Rear Cap LCR III
About the Sigma AF 12MM F/1.4 DC I C – Fuji X Mount
Effortless shooting for both stills and video. This ultra-wide F1.4 lens brings creativity and color to everyday moments —with superb image quality and mobility.
The Sigma 12mm F1.4 DC | Contemporary is an ultra-wide-angle prime lens that achieves the widest angle of view of 12mm among all F1.4 lenses for APS-C cameras available in the market today.¹ Featuring the latest optical design, the lens delivers high resolution, capturing vast starry skies and landscapes with exquisite detail from its wide-open aperture. While maintaining uncompromising performance, the compact and lightweight design maximizes the mobility of APS-C cameras, enabling agile shooting. This large-aperture ultra-wide-angle lens seamlessly combines high performance and portability, bringing new perspectives to a wide range of scenes, whether stills and video, including outdoor landscapes, travel, and street photography.
¹. As an AF-compatible interchangeable lens for APS-C cameras. (As of August 2025, by Sigma.)
Powerful visual expression enabled by superior optical performance combining an ultra-wide angle and F1.4 aperture
The widest angle of view of 12mm among F1.4 lenses for APS-C cameras
The world’s first¹ lens to achieve a 12mm focal length with a large F1.4 aperture. The ultra-wide angle of 12mm (equivalent to 18mm,² in 35mm format) captures the entire scene in front of you, while the dynamic angle of view and brightness of F1.4 enable highly impressive photography even in low-light conditions, such as nighttime street photography. Additionally, the ultra-wide angle is ideal for group selfies and vlogging. Whether shooting stills or video, the Sigma 12mm F1.4 DC | Contemporary offers high flexibility and diverse possibilities in creative expression.
1, As an AF-compatible interchangeable lens for APS-C cameras. (As of August 2025, by Sigma.)
2, Equivalent to 19mm for Canon RF Mount.
Outstanding optical performance across the entire image
Three double-sided aspherical lenses and two SLD glass elements are effectively arranged to achieve high optical performance from a wide-open aperture of F1.4. Sagittal coma flare is also well corrected, ensuring clear, crisp images from edge to edge, even in starry night scenes where fine details and sharpness are essential.
Compact and lightweight design for excellent portability
The effective placement of double-sided aspherical elements has resulted in a compact and lightweight design with a total length of 69.4mm and a weight of 225g¹, despite its ultra-wide angle and large aperture. This ensures high mobility, making the lens easy to carry around for travel and outdoor scenes. The lens is also compatible with shooting grips and gimbals. Photographers and filmmakers can enjoy the dynamic expression unique to a 12mm F1.4 lens, effortlessly.
1 The figure is for Sony E-mount.
Designed for comfortable shooting of both stills and video
Smooth, responsive autofocus powered by a stepping motor
High-speed, high-precision autofocus is achieved by driving a lightweight focus lens with a stepping motor that enables precise control. Whether shooting still images or videos, the Sigma 12mm F1.4 DC | Contemporary captures important moments without missing a beat. In addition to everyday snapshots, the lens delivers high tracking performance in scenes with movement, enabling high-quality video production.
Minimal focus breathing
Focus breathing is suppressed, minimizing changes in the angle of view caused by focus shift and enabling smooth, natural-looking focus pulls when recording video.
Aperture ring with various functions
Equipped with an aperture ring for intuitive control of the aperture. The Canon RF Mount version has a control ring instead of an aperture ring, allowing functions to be assigned according to the user’s preferred settings.
Designed to minimize flare and ghosting
Using advanced simulation technology, flare and ghosting have been largely eliminated, ensuring that the lens renders rich, high-contrast results in all conditions.
Dust- and splash-resistant structure¹ / water- and oil-repellent coating
In addition to a dust- and splash-resistant structure¹, the frontmost surface of the lens has a water- and oil-repellent coating applied, so that the lens can be used safely even in harsh outdoor environments.
1, The product is designed to be dust- and splash-resistant but is not waterproof. When using the lens near water, etc., take care not to allow large amounts of water to splash on it. If water gets inside the lens, it may cause a major malfunction and render the lens unrepairable.
A comprehensive lineup of F1.4 prime lenses for APS-C mirrorless cameras
The Sigma Contemporary line offers a wide range of F1.4 prime lenses for APS-C cameras. Based on the concept of combining exceptional resolution with a compact, lightweight design, Sigma has achieved a full lineup of F1.4 lenses across key focal lengths—16mm, 23mm, 30mm, and 56mm and now 12mm. The addition of the Sigma 12mm F1.4 DC | Contemporary further expands the large-aperture lens series, delivering outstanding optical performance, while maintaining the mobility suited to APS-C mirrorless systems.
Lens Construction 14 elements in 12 groups
FLD Glass 0
ELD Glass 0
SLD Glass 2
Aspherical Elements 3
Angle of View 99.6°
Aperture
Number of Diaphragm Blades 9
Rounded Diaphragm Yes
Minimum Aperture F16
Minimum Focusing Distance 17.2cm / 6.8in.
Maximum Magnification Ratio 1:8.4
Filter Size φ62mm
Dimensions (Diameter x Length*) FUJIFILM X Mount: φ68.0mm x 69.7mm / φ2.7in. x 2.7in
Weight 235g / 8.3oz
Powerful visual expression enabled by superior optical performance combining an ultra-wide angle and F1.4 aperture
Designed for comfortable shooting of both stills and video
A comprehensive lineup of F1.4 prime lenses for APS-C mirrorless cameras
