- Large aperature, standard prime lens offering superior peripheral brightness.
- Features angle of view of around 46.8 degrees.
- Super multi-layer lens coating reduces flare and ghosting.
- Includes fast and near silent HSM autofocus.
- Incorporates Aspherical and SLD Glass.
Product Description
-------------------
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.
Box Contains
------------
50mm f/1.4 DG HSM | A
Petal Lens Hood
Fitted Padded Case
Front and Rear Caps
Instruction Manual