Sigma 19mm f/2.8 EX DN Art Lens
(for Sony Alpha E-Mount)
Mirrorless wide angle essential.
This high-performance Sigma 19mm f/2.8 EX DN Art Lens is designed exclusively for mirrorless interchangeable lens cameras and has the equivalent angle of view as a 28.5 (35mm equivalent focal length) on the E-mount systems. Three glass mold aspherical lenses provide excellent correction for distortion, color aberration and field curvature. The inner focusing system corrects the fluctuation of aberration to maintain image quality regardless of the focal distance. Sigma's Super Multi-Layer Coating reduces flare and ghosting and provides sharp and high contrast images even at the maximum aperture.
The superior telocentric optical design improves image quality throughout the frame. This lens benefits from a newly-developed linear AF motor which moves the lens elements directly without the need for gears or the drive of other mechanical parts. This system ensures accurate and quiet autofocusing, making the lens suitable for video recording as well as still photos. The lens features a rounded 7 blade diaphragm creating an attractive blur to the out of focus areas of the image. This Sigma 19mm f/2.8 EX DN has a minimum focusing distance of 7.9 in. (20cm) and a maximum magnification ratio of 1:7.4.
Superior optical performance and functionality:
Mirrorless interchangeable lens cameras (MILCs) are popular because of their compact bodies, ease of operation and portability. Featuring superior optical performance and functionality that responds to the requirements of the photographer, the DN series of lenses for mirrorless interchangeable lens cameras offers Sigma's original innovation in a form that is more polished and refined than ever before. Exemplifying the characteristics of the Art line, these lenses represent a new world of possibilities, helping photographers find the deeper essence of their art and increase their opportunities to express themselves.
Superior image quality from the center of the edges of the image:
This lens features three glass mold aspherical lenses which provide excellent correction for distortion and field curvature. The inner focusing system corrects the fluctuation of aberration to maintain image quality regardless of the focusing position. The superior telocentric optical design improves the image quality throughout the frame.
When photographing with point light sources such as electric lights or reflections on a body of water in the background, the rounded 7-blade diaphragm helps produce an attractive bokeh effect -- even at large aperture settings.
A lens design ideal for a mirrorless interchangeable lens camera:
The simple shape of the focus ring, varying textures that distinguish each part of the lens, the elegantly etched product name, the use of metal on almost all external areas of the lens, the unibody design of the hood -- all of these elements add up to a lens design that is ideal for mirrorless interchangeable lens cameras. The interior of the lens features a quiet and powerful linear motor, while the brass mount combines high precision with durability. Designed for use over the long term, this lens features treated surfaces, enhanced strength and overall construction of the highest quality.
Linear AF motor:
This lens benefits from a linear AF motor which moves the lens unit directly without the need for gears or other extra mechanical parts. This system ensures accurate and quiet autofocusing, making the lens excellent for both recording video and taking still photos.
Flare and ghosting reduction:
From an early stage in the lens design process, flare and ghosting have been measured to establish an optical design resistant to strong incident light sources such as backlighting. Sigma's Super Multi-Layer Coating reduces flare and ghosting to help photographers produce sharp and high contrast images even in backlit conditions. The included lens hood can be attached to block out extraneous light, which can have a negative effect on rendering performance.
|With Super Multi-Layer Coating
||Without Super Multi-Layer Coating
High-precision, rugged brass bayonet mount:
The brass mount combines high precision with rugged construction. Its treated surfaces and enhanced strength contribute to the exceptional durability of the lens.
"Made in Japan":
All Sigma's manufacturing processes -- right down to molds and parts, with a few exceptions -- are carried out under a single integrated production system entirely in Japan.
Evaluation with Sigma's own MTF measuring system "A1":
Sigma used to measure lens performance with MTF measuring system using conventional sensors. However, they have now developed a proprietary MTF (modulation transfer function) measuring system (A1) using 46-megapixel Foveon direct image sensors. Even previously undetectable high-frequency details are now within the scope of quality control inspections. This lens will be checked using this "A1" method before it is shipped.
Applicable for the Mount Conversion Service:
As an experienced lens manufacturer that has been creating a diverse range of interchangeable lenses, Sigma offers a "Mount Conversion Service". With this paid service, the mount of your current SIGMA lenses can be changed to another mount of your choice. It gives a new life to your favorite lenses when you wish to use it on a different camera body.