SIGMA 20mm F1,4 DG HSM | Art (Sony-E)*

The ultimate F1.4 wide-angle prime for DSLRs.

This full-frame optic was the first full-frame 20mm prime ever built with an F1.4 aperture, making it one of the most desirable lenses on the market for astrophotography, weddings and interiors. Not only does the lens allow four times the amount of light on the sensor than an F2.8 lens with the same ISO and shutter speed, but the wide-aperture also creates a very shallow depth-of-field for pronounced subject separation when shooting portraits or closer-up objects.

Thanks to its advanced optical, which includes 5 SLD, 2 FLD and 2 aspherical elements, the lens has exceptional resolving power, delivering highly-detailed images with excellent sharpness and accuracy from the centre to the periphery of the frame. There is also very well-controlled coma flare, vignetting, distortion and chromatic aberration, ensuring a near-perfect image straight out of camera.

The exceptional build quality of the 20mm F1.4 DG HSM is exactly as you’d expect from an Art-line lens, both in the materials used, the overall ergonomics and the quality of craftsmanship. 

The exterior barrel is made of a polycarbonate called Thermally Stable Composite (TSC). Not only is this very strong and light, but it has a similar thermal expansion rate to aluminium. This ensures that the interior aluminium parts and the exterior TSC parts behave in a uniform way as temperatures change.

The focus ring is rubberised for easier operation and focusing is internal, meaning the lens never changes length. This makes it ideal for use on a gimbal as the centre of gravity remains fairly constant.

To reduce flare and ghosting in bright sun, and to help protect the front element from damage if dropped, the lens has a robust fixed petal-type lens hood.

The durable brass mount is surrounded by a rubber seal to help keep out dust and moisture.

The 20mm F1.4 DG HSM | Art delivers outstanding optical quality, with excellent rendering of detail right into the corners even wide open at F1.4.

The lens has an advanced optical design made up of 15 elements in 11 groups, including 2 aspherical elements, 5 SLD elements and 2 FLD elements. This ensures razor-sharp results and helps to eliminate chromatic aberration, flare, distortion and vignetting.

Advanced optical coatings reduce flare and ghosting when working in bright direct sunlight, creating high-contrast images with excellent colour saturation and strong blacks.

The wide angle-of-view of the 20mm F1.4 combined with its superb image quality makes this optic a perfect landscape lens. Colours are rich and accurate, and the high resolution optics are able to render an outstanding degree of detail even on the highest resolution cameras.

SIGMA’s two widest-angle Art primes for DSLRs both have extremely fast apertures, which makes them excellent choices for nightscapes and interiors. The 14mm F1.8 offers a wider angle-of-view, but its maximum aperture is two thirds of a stop less wide than the F1.4 of the 20mm. This means it lets in 58% less light wide open. The two lenses are almost exactly the same length, but the 14mm is wider and heavier.