Sigma ART 20mm F1.4 DG DN
Sigma
£859.99
(Inc. VAT)
£716.66
(Ex. VAT)
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Sigma
Sigma ART 20mm F1.4 DG DN
The Sigma AF 20mm F1.4 DG DN | Art - Available in L-Mount or Sony E-Mount
The SIGMA 20mm F1.4 DG DN | Art is a wide-angle, ultra-wide-aperture prime that is perfect for astrophotography. Available in L-Mount and Sony E-mount, it delivers outstanding Art-line optical quality and offers a range of advanced features. As well as being very well-suited to astro, the 20mm F1.4 is an ideal optic for landscapes, interiors and a range of other wide-angle applications.
Weighing in at just 635g, the lens is significantly lighter and more portable than Sigma’s existing 20mm F1.4, and introduces a number of important features including a manual aperture ring with de-click and lock functionality, a front filter thread and rear filter holder, a Lens Heater Retainer to hold a heat strip in position, and an all-new Manual Focus Lock switch to fully deactivate the focus ring.
The optical performance of the lens is exceptional, with ultra-sharp results across the entire frame even at F1.4, and very well controlled sagittal coma flare – essential for astrophotography. The bright aperture is perfect for night sky landscapes, as well as for hand-held low-light shooting and for achieving a shallow depth-of-field.
This superb image quality, compact form-factor and advanced feature-set, combined with a beautifully constructed body, make for a versatile, high-performance optic that will enable photographers to unleash their creative potential and start achieving wide-angle images with impact.
Key Features
Outstanding optical performance
The SIGMA 20mm F1.4 DG DN | Art delivers highly detailed results that easilysatisfy the demands of professional photographers and film-makers.
The lens is constructed with 17 elements arranged in 14 groups, including two SLDelements and three aspherical elements, one of which is the largest double-sided asphericalelement ever produced by Sigma. This advanced optical design rigorously suppresses a rangeof optical aberrations, such as sagittal coma flare and chromatic aberration, and ensures pin-sharpresults right across the frame even wide-open at F1.4.
The outstanding performance of this all-new wide-angle prime has been made possible thanks to Sigma’sunparalleled manufacturing technology at its sole production base at Aizu in Japan, which has evolved over 60years of lens development. The company pioneered the world’s first full-frame 20mm F1.4 prime in 2015, andhas since produced some of the highest-performing wide-angle primes and zooms on the market, including the14mm F1.8 DG HSM | Art and the 14-24mm F2.8 DG DN | Art.
Advanced functionality for every shooting situation
SIGMA’s experience in optical design, combined with its high-precision manufacturing capability, has made itpossible to equip the 20mm F1.4 DG DN | Art with a front filter thread in spite of its very large F1.4 aperture andultra-wide angle-of-view. The lens also comes with a rear filter holder, giving photographers the freedom tomore easily combine multiple filters. This is particularly useful for astrophotographers, who may want to attacha light pollution filter at the front and a soft filter at the rear.
The lens has an aperture ring built in, which is de-clickable for a smooth transition between aperture settings– useful for changing exposure seamlessly during video shooting. The aperture ring also has a lock switch. Anew Manual Focus Lock (MFL) switch completely deactivates the focus ring, ensuring the focus position won’tchange if it is accidentally knocked. So for night-sky photographers, the days of using tape the hold the focusring in position are over.
Another brand new feature designed with astrophotographers in mind is the Lens Heater Retainer, which is apronounced lip around the front element to keep a heat strip firmly in place. Heat strips are commonly used tostop condensation forming on the elements when working at night.
An AFL button is built into the lens, which can be customized*1to a range of different functions.
Superb build quality with uncompromising attention to detail
Designed and manufactured at Sigma’s sole factory in Aizuin Japan, the 20mm F1.4 DG DN meets the exceptionally highproduction standards that users have come to expect from Sigma’sGlobal Vision lenses.
The robust body is built from a combination of aluminum andThermally Stable Composite (TSC), giving it a sleek finish, and thefocus ring has a smooth, well damped action. A petal-shaped lens hood is included, and equipped with a lockmechanism to keep it securely fastened to the lens. A rubber grip makes it easier to attach and remove thehood.
Built with a dust and splash-resistant structure, a water- and oil-repellent coating on the front element, and arubber seal around the mount, the 20mm F1.4 DG DN is safe to use during longer outdoor shoots.*
The 20mm F1.4 DG DN is built with exceptional attention to detail in its functionality, construction and designergonomics, helping users achieve the best possible results in any shooting situation.
*While the lens is safe to use in light rain, please note that it is not fully weather sealed and therefore not waterproof.
Additional Features
- Lens construction: 17 elements in 15 groups, with 2 FLD and 3 aspherical elements
- Internal focus system
- Compatible with high-speed autofocus
- Stepping Motor
- Compatible with Lens Aberration Correction
- Function available on supported cameras only. Available corrections and auto correction functionality may vary depending on the camera model
- On cameras where lens aberration correction is controlled with ‘ON’ or ‘OFF’ in the camera menu, please set all aberration correction functions to ‘ON’ (AUTO)
- Support forDMF and AF+MF
- Compatible with AF Assist (Sony E-mount only)
- Super Multi-Layer Coating
- Nano Porous Coating
- Water- and oil-repellent coating
- Focus Mode Switch
- Lens Heater Retainer
- Aperture Ring
- Aperture Ring De-click Switch
- Aperture Ring Lock Switch
- AFL Button
- MFL Switch
- Rear filter holder
- Petal-type lens hood (LH878-04)
- Mount with dust and splash-resistant structure
- Support for switching between linear and non-linear focus ring settings (L-Mount only)
- Compatible with SIGMA USB DOCK UD-11 (sold separately; L-Mount only)
- Designed to minimise flare and ghosting
- 9-blade rounded diaphragm
- High-precision, durable brass bayonet mount
- ‘Made in Japan’ craftsmanship
- Every single lens is evaluated with Sigma’s proprietary MTF measuring system
Key Specifications
- Lensconstruction: 15 groups, 17 elements (2 FLD and 3 aspherical elements)
- Angle-of-view: 94.5°
- Number of diaphragm blades: 11 (rounded diaphragm)
- Minimum aperture: F16
- Minimum focusing distance: 23cm
- Maximum magnification ratio: 1:6.1
- Filter size:φ82mm
- Dimensions (max diameter x length):φ87.8mm x 111.2mm
- Weight: 635g
