Sigma 20mm F1.4 DG DN Art L-mount
The Sigma 20mm F1.4 DG DN Art is a fast prime lens that delivers exceptional optical performance in the most demanding situations. This makes it the ideal choice for astrophotography, thanks to its sharpness from corner to corner, even at full aperture.
Optical performance
The lens system of the Sigma 20mm F1.4 DG DN Art features 2 SLD elements, 3 aspherical glass elements, and a large double-sided aspherical glass element. These effectively suppress optical aberrations such as sagittal coma flare and distortion, allowing the lens to meet the high demands of the professional photographer.
Perfect results in demanding conditions
When the conditions you're shooting in require a great deal of attention or could affect your images, it's reassuring to have a lens that helps you out. The lens is equipped with a Manual Focus Lock switch, which lets you easily disengage the focus ring, so you don't have to worry about the focus distance shifting — ideal when you've got the night sky perfectly sharp above you.
In addition, the lens design makes it easy to attach a lens heater. A lens heater prevents internal condensation when shooting in cold conditions, such as during a clear night out in the field.
Excellent build quality
The Sigma 20mm F1.4 DG DN Art features a robust body with a dust- and splash-resistant construction. The front glass element also has a water- and oil-repellent coating.
The housing is made from aluminium combined with Thermally Stable Composite (TSC), giving the lens its precise, refined finish. Handy features such as the focus mode switch, customisable AFL button, and aperture ring lock are all easy to operate, making the Sigma 20mm F1.4 DG DN Art a highly user-friendly yet premium lens for the discerning photographer.
