The Sigma 12mm f/1.4 DC Contemporary is an ultra-wide-angle prime lens for APS-C mirrorless cameras, offering the widest angle of view (12mm, equivalent to 18mm in full-frame) among F1.4 lenses for APS-C. It combines a fast f/1.4 aperture with a compact, lightweight design, delivering high resolution and portability for landscapes, travel, street, and astrophotography. Compared to zoom lenses or slower primes, it provides superior low-light performance and a unique perspective, though it lacks weather sealing and image stabilization. Reviewers praise its sharpness and build quality, but some note softness in the extreme corners wide open and noticeable vignetting.
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Reviewers and owners praise the Sigma 12mm f/1.4 DC Contemporary for its unique ultra-wide fast aperture, excellent sharpness, and compact size. They note that it delivers impressive image quality for landscapes and astrophotography, though some mention vignetting and corner softness wide open.
The Sigma 12mm f/1.4 DC Contemporary is an ultra-wide-angle prime lens for APS-C cameras. Its 12mm focal length is equivalent to 18mm in 35mm format (19mm for Canon RF mount). The f/1.4 aperture suits low-light scenes such as night street photography and starry skies, and the wide view works for landscapes, travel, group selfies and vlogging.
The optical design uses three double-sided aspherical elements and two SLD glass elements. This gives high resolution from the wide-open aperture, and sagittal coma flare is well corrected for clear images edge to edge. Flare and ghosting are largely suppressed.
A stepping motor drives the lightweight focus lens for fast, precise autofocus in stills and video. Focus breathing is minimized, so the angle of view changes little during focus pulls. The lens has an aperture ring. The Canon RF mount version has a control ring instead, whose functions can be assigned by the user.
