50mm F2
DG DN
- All-metal construction
- Classic standard focal length prime lens
- Fast maximum aperture of F2
- Manual aperture ring
- High-speed, accurate autofocus
- Magnetic lens cap and metal lens hood
- Mount with dust and splash-resistant structure
- Designed to minimize flare and ghosting
- Compatible with Lens Aberration Correction*
- Made in Japan
AWARDS
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| Angle of view | Standard |
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| Camera Type | Mirrorless |
| Lens Mount | L-Mount, Sony E-mount |
| Sensor Size | Full Frame |
| Construction | 11 elements in 9 groups (1 SLD and 3 aspherical lenses) |
| Angle of view | 46.8° |
| Number of diaphragm blades | 9 (rounded diaphragm) |
| Minimum aperture | F22 |
| Minimum focusing distance | 45cm |
| Maximum magnification ratio | 1:6.8 |
| Filter diameter | 58mm |
| Dimensions (diameter x length) | Sony E-mount φ70mm × 70mm |
| Weight (g) | Sony E-mount 345g |
| Edition number | C023 |
| Supplied Accessories | Lens hood LH633-01, Magnetic Front Cap LCF58-01M, Front Cap LCF-58 â…¢, Rear Cap LCR |
| Accessories | USB Dock UD-11 (L-mount), SIGMA WR PROTECTOR 58mm, SIGMA WR UV FILTER 58mm, SIGMA WR CIRCULAR PL FILTER 58mm |
| EAN-code | Sony E-mount 085126314651 |
| Specifications Info | * All figures calculated by L-Mount. Note: The L-Mount Trademark is a registered Trademark of Leica Camera AG. About Product Name: Product name includes "DG" when the lens is designed to deliver the ultimate in performance on cameras with full-frame sensors, and "DN" when the lens design is optimized for mirrorless cameras with the short flange focal length. |
“Standard lens” that matches the optical performance standards set by the Sigma Contemporary line of lenses.
Sigma I series lenses are developed around the concept of “Compact everyday lenses with outstanding image quality” and the Sigma 50mm F2 DG DN | Contemporary is exactly that. It features high-quality optics in a compact size, perfect for a wide variety of photographic styles. Built from the ground up for mirrorless cameras, the Sigma 50mm F2 DG DN | Contemporary is constructed using a single SLD glass element and three aspherical lens elements that are excellent at correcting various types of aberration for clear, high-definition images.The conflicting ideals of improving optical performance while reducing body size and weight are achieved through the latest optical design, and the processing and production technologies at Sigma’s only production facility in Aizu.The 50mm focal length is mostly known for portrait photography, so careful consideration was taken when designing the lens, focusing on the smoothness of the bokeh created by the F2 aperture. Its optical design gives smooth transitions from in-focus to out-of-focus areas, and helps minimize flare and ghosting caused by backlit environments. The quiet stepping motor provides quick, reliable autofocusing for both stills and video.
Expanding the I series lineup.
“Creating pictures that are beyond beautiful”.
The Sigma I series features full-frame compatible lenses that offer new value to mirrorless systems. The combination of superb optical performance with a level of compactness that is perfectly suited to smaller and lighter modern mirrorless cameras will bring you new opportunities for a perfect shot. Sigma is aware that in today’s world we have a wide range of camera choices, especially with the increase in mobile phone ownership. But with many photographers looking for something more than something that simply captures images when they choose to own a camera and lens, I series lenses offer the ultimate combination of superb optical performance, outstanding usability and compact form-factor. Sigma’s excellence in development and production technologies has been built up since our founding in 1961 and became increasingly sophisticated with the introduction of the Sigma Global Vision brand in 2012. With this as a base, Sigma has given careful thought to the quality of the products, the feeling of using it and the pleasure of owning it. This is how the I series was born.
Exceptional I series build quality with a compact form-factor
All I series lenses have an all-metal construction. The precision-cut aluminum parts not only give the barrel a sleek, stylish finish, but provide superb durability that improves the quality of the entire product. Metal materials are also used in internal structures that slide with the operation ring for added robustness. These high-precision components crafted with Sigma’s cutting-edge metalworking technology are also used in Sigma’s CINE LENS lineup for professional cinematographers and provide a tactile, ergonomic feel that make the lens a pleasure to use.
A smooth hairline cover ring is used between the focus and aperture rings to act as a finger hold when attaching and detaching the lens.
Magnetic metal lens cap
I series lenses are accompanied by a dedicated magnetic metal lens cap*, in addition to a normal plastic cap. This dedicated metal cap clips to the front surface of the lens magnetically. It is no exaggeration to say that this meticulously crafted cap represents the finishing touch for the I series.
*Except Sigma 45mm F2.8 DG DN | Contemporary
Magnetic metal lens cap holder LENS CAP HOLDER CH-11 (sold separately)
When a cap is removed from the lens it should have a proper place where it can be kept. Using this as a starting point, a cap holder using the magnetic force of the dedicated cap was created.
With the cap attached to the ring plate, and the plate clipped to a bag or belt, the cap is always within easy reach and is less likely to get lost. Plus, its elegant design is a stylish addition to a photographer’s equipment.
LENS CONSTRUCTION
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SLD GLASS
ASPHERICAL LENS
MTF CHART
There are two types of MTF chart. One considers the diffraction quality of light, which is called "Diffraction MTF", and the other, "Geometrical MTF" does not.
The quality of light appears in the diffracted light, and becomes more distinct as the F value gets bigger, resulting in lower image quality. Also, diffracted light exists at every aperture, which is why Sigma has been releasing Diffraction MTF data from the beginning since it is very close to the actual image data.
The advantage of using "Geometric MTF" data is that it is easy to measure and calculate since it does not consider the diffraction quality of light, yet it tends to show higher values in the graph than actual images.
The readings at 10 lines per millimeter measure the lens's contrast ability ( red lines), repeating fine parallel lines spaced at 30 lines per millimeter measure the lens's sharpness ability (green lines), when the aperture is wide open.
Fine repeating line sets are created parallel to a diagonal line running from corner to corner of the frame, are called Sagittal lines (S) and sets of repeating lines vertical to these lines are drawn, called Moridional (M) line sets.
*The MTF chart gives the result at the wide-open aperture.
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Spatial frequency |
S:Sagittal Line |
M: Meridional Line |
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10lp/mm |
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30lp/mm |
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DIFFRACTION MTF
DIFFRACTION MTF
GEOMETRICAL MTF
GEOMETRICAL MTF
Stepping Motor
The lens is capable of smooth, quiet and high-speed AF made possible by a stepping motor, as well as supports Face/Eye Detection AF and video AF.
Super Multi-Layer Coating
SIGMA's own Super Multi-Layer Coating suppresses flare and ghosting by preventing reflections with in the lens. All lenses in the current SIGMA range feature this original technology. In digital cameras, flare and ghosting may also be caused by reflections between the image sensor and lens surfaces. Here too, SIGMA's Super Multi-Layer Coating is highly ef fective, assuring images of outstanding contrast.
Aperture ring
Aperture ring, designed to help users work intuitively
Linear focus / Non-linear focus (for L-Mount only）
A focus movement method of interchangeable lenses for mirrorless cameras (DN lens) in relation to the rotational angle of the focus ring during manual focusing.
With "non-linear focus," the amount of focal point movement varies depending on the focus ring rotational speed.
With linear focus, if the focus ring rotational angle is the same, the amount of focal point movement remains the same regardless of the focus ring rotational speed.
Mount with Dust and Splash Resistant Structure
The lens mount incorporates rubber sealing to protect the mount from dust and water drops.
Lens construction: 11 elements in 9 groups with 1 SLD and 3 aspherical lens elements
Inner focus system
Compatible with high-speed autofocus
Compatible with lens-based optical correction
Support DMF and AF+MF
Compatible with AF assist (Sony E-mount only)
Lens hood (LH633-01)
Magnetic metal lens cap (LCF58-01M)
Compatible with SIGMA USB DOCK UD-11 (sold separately / for L-Mount only)
Designed to minimize flare and ghosting
9-blade rounded diaphragm
High-precision, durable brass bayonet mount
