Sigma 50mm f/1.4 ART DG HSM Lens (for Nikon Cameras)
Incredible resolution ideal for the high-megapixel era.
Introducing the new benchmark large-aperture standard lens, the Sigma 50mm f/1.4 ART DG HSM Lens. The staple Sigma 50mm f/1.4 DG HSM has been redesigned and re-engineered to set a new standard for the Art line. With a large f/1.4 aperture, the Sigma 50mm f/1.4 prime lens is a pro-level performer for shooting everything including portrait photography, landscape photography, studio photography and street photography.
A Hyper Sonic Motor (HSM) ensures quiet, smooth and accurate autofocusing, and paired with Special Low Dispersion (SLD) glass and Super Multi-Layer coating, the 50mm f/1.4 is a high performance lens for the modern DSLR. 13 elements in 8 groups allow for unsurpassed performance even at wide apertures and close-up photography is easily managed with a minimum focusing distance of 0.4 in. (40cm).
Art line delivers high-level artistic expression:
Sigma is organizing all its interchangeable lenses into three product lines; Contemporary, Art, and Sports, where each line has a distinctive concept. Designed with a focus on sophisticated optical performance and abundant expressive power, the Art line delivers high-level artistic expression. With the astonishing rendering performance that meets the high standard, along with landscapes, portraits still-life, close-up, and casual snaps, they are perfect for the kind of photography that unleashes the inner artist. Ideal for studio photography, they offer just as much expressive scope when capturing architecture and starry skies and many other scenes.
Astonishing rendering performance:
Utilizing know-how and the latest design technology accumulated through the past developments, it corrects the aberration thoroughly and achieves high resolution and astonishing rendering performance even near the edge of the image.
Achieving both high resolution and beautiful bokeh:
While pursuing a high level of resolution on the focused point, bokeh in front and behind the point of focus is carefully maintained to have soft rendering. Aberrations including sagittal coma flare and color distortion that affect the image quality are thoroughly corrected. From open aperture, high-definition rendering without blur is achieved. Moreover, by ensuring vignetting at the minimum and preventing color blur around the front and back of the focus point, it also achieves natural bokeh.
Excellent correction of sagittal coma flare:
It is ideal for a wide aperture standard lens to have a high rendering performance from open aperture throughout the entire image. For instance, the molded glass aspherical lens elements provide excellent correction to sagittal coma flare. It is perfect for astronomical photography and shooting of illumination because of the reduced blur on the point light sources near the edge of the image. It also creates an attractive bokeh in portraits and indoor shooting.
Correction of axial chromatic aberration:
For axial chromatic aberration that is hard to correct even during the image processing, SLD (Special Low Dispersion) glass elements are incorporated, ensuring high image quality throughout the entire focusing range. The lens achieves sharp and high contrast image rendering.
It is not possible to compensate for distortion just by changing the aperture values. Thus, the lens development stage was vital in ensuring minimized distortion. The Sigma 50mm F1.4 DG HSM has positioned each glass element to optimize the power layout at respective positions, and succeeded in minimizing distortion.
Rich peripheral brightness:
It secures very rich brightness in the peripheral areas, which can be a common problem for a lens with a large diameter. By positioning wide elements in the front group, it has improved the efficiency at large apertures. Since it is capable of minimizing vignetting, very clear depiction across the image is ensured.
Designed to minimize flare and ghosting:
Flare and ghosting were thoroughly measured and monitored from the lens development stage to establish an optical design which is resistant to strong incidental light such as backlight. The Super Multi-Layer Coating reduces flare and ghosting and provides sharp and high contrast images even in backlit conditions.
Minimum focusing distance of 0.4 in. (40cm):
The lens incorporates a floating system that adjusts the distance between lens groups while focusing, thereby reducing the amount of lens movement required. This achieves a minimum focusing distance of 40cm and maximum magnification ratio of 1:5.6. As there is less variation in aberration at different shooting distances, the lens delivers high rendering performance throughout the entire focusing range.
Hyper Sonic Motor ensures High AF Speed:
The HSM (Hyper Sonic Motor) ensures a silent, high-speed AF function. Optimizing AF algorithm, smoother AF is achieved. Also, this lens can offer 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.
* The default setting of Full-time MF function varies for each mount.
Incorporating Rounded Diaphragm:
The 9 blade-rounded diaphragm creates an attractive blur to the out-of-focus areas.
With the new product lines, supplied hoods incorporate rubber for the connected part. Lens caps and AF/MF switches are also newly designed in order to improve usability. For the parts inside, metals and a new material called TSC (Thermally Stable Composite), which works well with metals, are located to achieve products with high accuracy. The lens barrel includes the year of release, engraved for users to recognize when the lens was released.
Brass made bayonet mount:
This lens incorporates a brass made bayonet mount which has both high accuracy and durability. A special treatment to reinforce its strength is applied to the surface giving it greater strength and making it highly resistant to long-term use.
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. The Sigma 50mm F1.4 DG HSM will be checked using this "A1" before they are shipped.
Made in Japan:
All Sigma's manufacturing -- right down to molds and parts -- with a few exceptions, are carried out under a single integrated production system, entirely in Japan. Sigma is now one of the very few manufacturers whose products are solely "made in Japan".