SIGMA 14mm F1.4 DG DN | Art
• Le premier objectif 14 mm plein format au monde avec une ouverture de F1.4
• Optimisation optique pour l'astrophotographie
• Système de mise au point interne
The world’s first full-frame 14mm lens with an F1.4 aperture
The SIGMA 14mm F1.4 DG DN | Art is the world’s first F1.4 mirrorless lens with an angle-of-view this wide.
The F1.4 aperture is two thirds of a stop brighter than its predecessor the SIGMA 14mm F1.8 DG HSM | Art for
DSLRs, which means it allows 58% more light on to the camera’s sensor. This makes it even better suited to
photographing the night sky, as well as for using hand-held in dark environments.
Optically optimised for astrophotography
With its advanced optical design that includes 1 SLD, 3 FLD and 4 aspherical elements, the lens has been designed with astrophotography in mind. With a particular emphasis on optical quality at infinity focus, the lens has very well-controlled optical aberrations and sagittal coma flar, which ensures that bright points of light remain pin-sharp and rount at all apertures and across the entire frame.
The lens uses in-camera optical aberration control profiles, to help correct for any distortion or vignetting, whereas optical issues that are more difficult to improve digitally, such as corner softness and chromatic aberration are eliminated by the lens's sophisticated optical design. Using optical aberration control selectively in this way helps to keep the size and weight of the lens down.
A professional feature-set with superb build quality
The 14mm F1.4 DG DN | Art has a professional feature-set that makes it easier for photographers and film-makers to achieve the best possible results. Built in to the barrel is an aperture ring, which can be set to auto for aperture control on the camera. With a very precise action, the ring can also be de-clicked if preferred, or locked in place so that it’s not accidentally knocked.
At the front of the barrel is a Lens Heater Retainer, which was a feature introduced on the SIGMA 20mm F1.4 DG DN | Art. This helps hold a heat strip in place, which are often used by astrophotographers when shooting in cold conditions to prevent condensation build-up on the front element.
The lens features a rear filter holder that allows sheet-type filters to be attached. Soft type filters are preferred by astrophotographers as they make stars appear softer, larger and brighter. Other types of sheet-type filter can also be used.
A brand-new front lens cap has been specially designed with these types of filters in mind. Two filter slots are provided to store pre-cut sheet-type filters, allowing them to be carried with the SIGMA 14mm F1.4 DG DN Art lens at all times. Previous lenses such as the SIGMA 14mm F1.8 DG HSM | Art used a push fit type cap. The new front cap now features a secure lock mechanism to prevent the cap from falling off unintentionally.
|Formule optique||19 elements, 15 groups (1 SLD, 3 FLD and 4 aspherical elements)|
|Lens Type||Wide Angle|
|Sensor Size||Full Frame|
|Angle de vue||114.2°|
|Diaphragme||11 (rounded diaphragm)|
|Distance minimale de mise au point||30cm|
|Rapport de reproduction maximal||1:11.9|