Incredible resolution ideal for the high-megapixel era. Designed to offer the iltimate 50mm f1.4 performance.

• Sigma was the first lens manufacturer to introduce a 50mm F1.4 lens. Now, to create the ultimate go-to lens, we took optical performance and image quality to the limit. The result is a true icon of Sigma quality. Fulfilling the concept of our Art line at the highest level, the 50mm F1.4 DG HSM is a large-aperture standard lens that delivers top performance. Its outstanding resolution makes it ideal for the high-megapixel era. It delivers exquisitely balanced images with a beautiful bokeh effect, setting a new benchmark for large-aperture standard lenses. It is the ultimate expression of the 50mm F1.4 specification, known to bring out the photographer’s unique personality and approach. Once you own it, you’ll never want to be without it!
• A 50mm F1.4 large-aperture lens offers an angle of view similar to human vision, a beautiful bokeh effect, and expressive versatility. It’s a basic specification that lets photographers take many different approaches to their craft. For this very reason, it demands a high level of fundamental performance. Sigma has designed lenses especially for digital SLRs since they first appeared on the market. In 2008, we first introduced the Sigma 50mm F1.4 EX DG HSM. Although compared to the lenses of today it had a fairly large body, this lens offered uncompromising performance and embodied our ideal of the standard lens. Until this time, only camera manufacturers had produced a lens in this specification for DSLRs. Our version of this go-to lens created quite the stir at first. Earning the support of photographers with its exceptional performance, it has become one of our representative lenses. The Sigma F1.4 DG HSM fulfills our design concept and quality requirements at the highest level. While producing a beautiful bokeh effect, it features exceptional peripheral brightness and minimal distortion. 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 flagship 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 color 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-molded 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 nighttime illumination. In addition, its beautiful bokeh effect makes it a great go-to lens for portraits, interior shots, 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 center of the frame all the way to the edges.
• HSM (Hyper Sonic Motor) delivers high AF speed and extremely quiet performance. An enhanced algorithm offers even smoother automatic focusing. Optimizing AF algorithm, smoother AF is achieved. Also, new firmware offers full-time MF function by rotating the focus ring of the lens while auto focusing. Without changing the AF/MF Focus Mode Switch, it allows faster focus adjustment.
• Sigma’s floating system adjusts the distance between lens groups during focusing, thereby reducing the amount 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.
• Specificatons
  Lens construction 13 elements in 8 groups
  Minimum aperture F16
  Filter size 77mm
  Angle of view (35mm equivalent) 46.8°
  Minimum focusing distance 40cm / 15.7 in.
  Dimensions(diameter x length) 85.4mm × 99.9mm
  Number of diaphragm blades 9 (rounded diaphragm)
  Maximum magnification ratio 1：5.6
  Weight 815g