Sigma 12mm f/1.4 DC Contemporary Lens (Sony E)

Sigma 12mm f/1.4 DC Contemporary Lens (Sony E, Black)
Ultra-Wide Fast Prime – Expansive 12mm Focal Length (18mm Full-Frame 35mm Equivalent), Bright f/1.4 Maximum Aperture for Low Light & Selective Focus, Quiet Stepping AF Motor with Minimized Focus Breathing, Advanced Optical Formula (Three Double-Sided Aspherical Elements, Two SLD Elements), Physical Manual Aperture Ring, Water- and Oil-Repellent Front Coating, Dust- and Splash-Resistant Construction, Rounded 9-Blade Diaphragm, Lightweight Travel Profile, Includes Front Cap, Rear Cap, and Dedicated Lens Hood, Native APS-C Sony E-Mount (Excellent Condition)

The Sigma 12mm f/1.4 DC Contemporary is a portable, ultra-wide prime lens engineered specifically for APS-C-format Sony E-mount mirrorless cameras (delivering an expansive 18mm full-frame 35mm equivalent focal perspective). Designed as the lightest and widest f/1.4 option in Sigma’s DC Contemporary prime lineup, this optic provides a sweeping field of view well-suited for architectural interiors, landscape vistas, night astrophotography, street scenes, and handheld vlogging setups. The fast f/1.4 maximum aperture excels in challenging low-light environments while enabling expressive shallow-depth-of-field separation uncommon in ultra-wide primes.

The optical formula utilizes 14 elements arranged in 12 groups, incorporating three double-sided aspherical elements to suppress geometric distortion and maintain high corner-to-corner sharpness, alongside two Special Low Dispersion (SLD) glass elements that curb chromatic aberrations and color fringing. Autofocus is powered by a high-speed stepping motor (STM) engineered with minimized focus breathing, delivering quiet, accurate tracking optimized for both fast stills and video production. The lens barrel features a tactile manual aperture ring for direct exposure adjustments, a rounded 9-blade diaphragm for smooth background bokeh, front water- and oil-repellent optical coatings, and weather-resistant mount sealing. Complete with front and rear caps and its dedicated lens hood, this ultra-wide prime delivers premium optical performance in top-tier shape.

CONDITION DIAGNOSTICS & PHYSICAL NOTES

Included Components: COMPLETE ULTRA-WIDE PRIME OUTFIT. Supplied with the Sigma 12mm f/1.4 DC Contemporary lens, genuine Sigma 62mm front snap-on lens cap, genuine rear E-mount lens cap, and dedicated Sigma bayonet lens hood. (Camera bodies, 62mm screw-in filters, and storage pouches sold separately unless pictured).

Exterior & Barrel Status: EXCELLENT CONDITION. The matte black composite and metal barrel chassis, textured manual focus ring, tactile aperture ring, bayonet mount, and dedicated hood show minimal to no signs of previous handling, with no deep scratches, dings, scuffs, or edge finish wear. All laser-etched focal length numbers, Sigma Contemporary badging, and aperture markings remain crisp, clean, and fully legible.

Optical Status: EXCELLENT CONDITION. Both front and rear external optical glass surfaces are pristine and completely free of scratches, scuffs, cleaning marks, haze, fungus, or element separation. The internal optical assembly is clean and clear with only trace, negligible dust specks typical of standard handling; bench testing confirms these specks do not impact resolving power, edge contrast, or color fidelity across working apertures. Factory anti-reflective multi-coatings and protective front coatings remain immaculate.

Mechanical & Electronic Status: FULLY FUNCTIONAL. The internal stepping autofocus motor acquires focus swiftly, accurately, and silently; focus breathing compensation and fast eye-tracking operate reliably; the manual aperture ring rotates with crisp, positive detents; the manual focus ring turns with smooth, fluid damping; the 9-blade rounded diaphragm stops down cleanly without sticking or oil residue; gold-plated E-mount electronic contacts communicate Exif metadata and in-body corrections reliably with zero camera error codes.

KEY FEATURES & PERFORMANCE HIGHLIGHTS

Sweeping 18mm Equivalent Field of View: Expansive ultra-wide perspective (12mm APS-C / 18mm full-frame equivalent) captures wide scenes, architecture, and vlogging frames.

Bright f/1.4 Maximum Aperture: Excels in dim ambient light, astrophotography, and interior shooting while delivering shallow depth-of-field control.

Lightest f/1.4 DC Contemporary Prime: 20% shorter than the 16mm f/1.4 DC DN, offering an agile, balanced form factor for handheld gimbal and travel rigs.

Advanced Optical Architecture: Combines 3 double-sided aspherical elements and 2 SLD elements to control chromatic fringing, spherical distortion, and coma.

Stepping AF Motor with Low Breathing: Provides swift, whisper-quiet autofocus response with suppressed focus breathing for clean video focus racks.

Dedicated Manual Aperture Ring: Provides direct on-barrel mechanical control over aperture settings for quick exposure changes.

Rounded 9-Blade Diaphragm: Engineered with 9 curved blades to produce natural, smooth out-of-focus background highlights and circular bokeh.

Dust- and Splash-Resistant Build: Features protective rubber gasket sealing at the mount to guard internal components against environmental dust and moisture.

Water- and Oil-Repellent Coating: Applied to the front element to repel moisture, grease, and fingerprints for easy maintenance in the field.

Complete Cap & Hood Bundle: Supplied with front snap-on cap, rear dust cap, and dedicated bayonet hood to block off-axis flare and protect the front element.