- Fits Sony A-. Large aperature, standard prime lens offering superior peripheral brightness.
- Standard lens with large maximum aperture of F1.4.Filter Size (mm) : φ77mm.
- Super multi-layer lens coating reduces flare and ghosting.
- Includes fast and near silent HSM autofocus.
- Incorporates Aspherical and SLD Glass.
Product Description
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Uncompromising in every detail, this large-aperture standard
lens offers the ultimate in image quality. Its high resolution
makes it perfect for the high-megapixel era. Resolution is
extremely crisp at the area in focus, while both front and rear
bokeh are silky-smooth. Offering the ultra-high performance that
characterizes our Art line, this lens inherits the design
principles of the line's first model, the ship Sigma 50mm
F1.4 DG HSM.
While maximizing resolution at the area in focus, this lens
offers a silky-smooth bokeh affect to the front and rear. To
achieve exceptionally crisp resolution, we have minimized
sagittal coma flare, chromatic aberration, and every other type
of optical aberration that affects image quality. The result is
minute detail without bleeding or streaking, even at wide-open
aperture. Moreover, we have also minimized both vignetting and
colour streaking to the front and rear of the area in focus,
thereby establishing a bokeh effect that is natural and
aesthetically pleasing.
Axial chromatic aberration is difficult to correct after a
photograph is taken using image processing software. For this
reason, this lens features SLD (Special Low Dispersion) glass to
minimize axial chromatic aberration and deliver sharp,
high-contrast image quality throughout the frame.
An ideal large-aperture standard lens offers outstanding image
quality across the image plane, even at wide-open aperture.
Sagittal coma flare is an optical aberration in which point light
sources near the image periphery have a tail ("coma") instead of
appearing round. To minimize this aberration, we have included a
precision-moulded aspheric lens element in the rearmost lens
group. Since it minimizes the streaking of point light sources
near the edge of the image, this lens is an excellent choice for
shooting heavenly bodies and night-time illumination. In
addition, its beautiful bokeh effect makes it a great go-to lens
for portraits, interior s, and many other applications.
Distortion is an optical aberration in which straight lines
appear bent or curved. Since adjusting the focus cannot correct
this aberration, it must be minimized at the design stage. This
lens features aspheric lens elements and an optimized power
distribution to minimize distortion from the centre of the frame
all the way to the edges.
Large-aperture lenses are prone to reduced peripheral brightness.
In this lens, we have made the forward lens group large-aperture,
thereby raising aperture efficiency. The result is minimal
reduction of brightness at the image periphery and even image
quality throughout the photograph. Even at the wide-open
aperture, you can shoot a blue sky without fear of reduced
brightness and achieve a beautiful bokeh effect at the same time.
The x-axis represents image height (distance from center of image
in mm), and the y-axis represents the relative illumination at
the edge of the image (with illumination at the center of the
image defined as 100%). When relative illumination is low, the
corners of the image appear dark, resulting in vignetting.
HSM (Hyper Sonic Motor) delivers high AF speed and extremely
quiet performance. An optimized algorithm offers even smoother
automatic focusing, and full-time manual focus override is
another key feature.
Sigma's floating system adjusts the distance between lens groups
during focusing, thereby reducing the a of lens movement
required. The result is less aberration at different shooting
distances. Thanks to this system, this lens offers a minimum
focusing distance of just 40 cm, a maximum magnification ratio of
1:5.6, and superb image quality at every shooting distance.
Conventionally it is considered essential to leverage the
qualities of metal and polycarbonate in camera and lens layout
design. A first for the industry, the barrel of the new series of
Sigma lenses features a new TSC (Thermally Stable Composite)*
that offers minimal thermal shrinkage combined with exceptional
hardness. It also offers 25% greater elasticity than
polycarbonate. Since its thermal shrinkage is low, TSC matches
well with metal parts, further contributing to the high-precision
construction of the lens.
When photographing with point light sources such as electric
lights or reflections on a body of water in the background, the
rounded 9-blade diaphragm helps produce an attractive bokeh
effect-even at large-aperture settings.
The brass combines high precision with rugged construction.
Its treated surfaces and enhanced strength contribute to the
exceptional durability of the lens. Angle of view: 46.8°
Box Contains
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50mm f/1.4 DG HSM | A
Petal Lens Hood
Fitted Padded Case
Front and Rear Caps
Instruction Manual