Sigma 20mm f/1.4 DG DN Art Lens for Sony E

The Sigma 20mm f/1.4 DG DN Art is an ultra-wide, high-aperture prime lens engineered specifically for full-frame Sony E-mount mirrorless cameras. Belonging to Sigma’s flagship Art line, it delivers exceptional corner-to-corner sharpness, high contrast, and minimal optical aberrations even when shooting wide open at f/1.4. Its ultra-wide 20mm field of view paired with a bright f/1.4 maximum aperture makes it a premier choice for astrophotography, architectural interiors, landscapes, and low-light environmental portraiture. Equipped with a fast, quiet HLA (High-response Linear Actuator) stepping motor, a physical aperture ring with de-click and lock switches, and a manual focus lock (MFL) switch, it provides professional control for both still photographers and video creators.

Key Features and Specifications

* Sony E-Mount (Full-Frame Format): Expansive 20mm ultra-wide focal length delivers a sweeping 94.5° angle of view.
* Ultra-Fast f/1.4 Maximum Aperture: Exceptional light-gathering capability ideal for night skies, astrophotography, and low-light handheld shooting with controlled depth of field.
* Advanced Optical Architecture: Features 17 elements in 15 groups, including 2 SLD (Special Low Dispersion), 3 Aspherical, and 1 FLD glass element to eliminate sagittal coma flare and chromatic aberration.
* High-Response Linear Actuator (HLA): Stepping motor system provides rapid, smooth, and quiet autofocus for both stills and video workflows.
* Dedicated Astro Features: Includes a Manual Focus Lock (MFL) switch to freeze focus position and an integrated rear filter retainer for sheet filters.
* Physical Control Rings: Aperture ring with click/de-click toggle and aperture lock switch for tactile control.
* 82mm Front Filter Thread: Accepts standard 82mm screw-in front filters despite the ultra-wide focal length.

Condition and Included Accessories

* Included Accessories: Front lens cap, rear lens cap, and Sigma GP-21 guide plate included. Note: Petal-type lens hood is not included.
* Physical and Operational Condition: Operationally in good working order and fully functional. Optically, some light internal dust is present between the lens elements, which does not impact image quality. Cosmetically shows visible cosmetic wear and finish marks around the outer lens barrel.