18-50mm F2.8
DC DN
- Smallest and lightest F2.8 standard zoom for APS-C mirrorless
- Full-frame equivalent zoom range of 27-75mm
- High-speed autofocus with stepping motor
- Compatible with lens aberration correction*
- Minimum focusing distance of 12.1cm / 4.8 in.
- Mount with dust and splash-resistant structure
- High-precision, durable brass bayonet mount
- Designed to minimize flare and ghosting
- Thermally Stable Composite (TSC) construction
- Made in Japan
*Function available on supported cameras only. Available corrections / functionality may vary depending on camera model.
AWARDS
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TIPA |
2022 |
| Angle of view | Wide Angle |
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| Camera Type | Mirrorless |
| Lens Mount | L-Mount, Sony E-mount, Canon EF-M mount, Canon RF Mount, Fujifilm X mount |
| Sensor Size | APS-C |
| Construction | 13 elements in 10 groups |
| Angle of view | 76.5° (W)-31.7° (T), (73.4°-30.0°; Canon RF Mount) |
| Number of diaphragm blades | 7 (rounded diaphragm) |
| Minimum aperture | F22 |
| Minimum focusing distance | 12.1 (W)-30 (T) cm |
| Maximum magnification ratio | 1:2,8 (L)–1:5 (T) |
| Filter diameter | ⌀ 55mm |
| Dimensions (diameter x length) | L-Mount ⌀ 65.4mm x 74.5mm |
| Weight (g) | L-mount
290g |
| Edition number | C021 |
| Supplied Accessories | Petal Type Lens Hood LH582-02, Front Cap LCF-55III, Rear Cap LCRII |
| Accessories | USB Dock UD-11 (L-Mount only), WR Protector 55mm, Protector 55mm, WR UV Filter 55mm, WR Circular PL Filter 55mm |
| EAN-code | L-Mount 085126585693 |
| 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. |
Large F2.8 aperture and superb image quality
The Sigma 18-50mm F2.8 DC DN | Contemporary covers 27mm to 75mm in the 35mm format, and has a wide aperture of F2.8 throughout the entire zoom range. This makes it easy to achieve blurry backgrounds, which is ideal for shooting attractive portraits and close-ups. The bokeh is smooth and attractive so doesn’t distract from the in-focus subject.
The lens’s three high-precision glass-molded aspherical elements coupled with the minimization of the total number of elements yields superb optical quality without excessive weight, and the use of in-camera aberration correction further eliminates optical imperfections such as distortion and vignetting. This has all been made possible by the latest optical design technology at Sigma’s only production base in Aizu, where all Sigma lenses are built.
Exceptionally compact and lightweight body ideal for mirrorless cameras
The Sigma 18-50mm F2.8 DC DN | Contemporary is remarkably compact, matching the portability of APS-C mirrorless camera bodies. This makes it a perfect workhorse lens that is ideal for general day-to-day use. The lens is currently the smallest and lightest in its class *1 , boasting a maximum diameter of φ65.4mm, a length of 74.5mm and weight of 290g *2 , yet still maintains a constant aperture of F2.8.
To keep the lens as light as possible, Sigma constructed the body from carefully selected materials. A polycarbonate called Thermally Stable Composite (TSC) was used for the construction of the barrel, which is sleek, robust, and importantly has a thermal conductivity close to that of aluminum. This ensures stable performance and good operability when used in changing temperatures. By deliberately using metal for some of the internal structure, the parts could be much thinner and have a higher rigidity, ensuring the lens can stand up to frequent, heavy use.
*1 As an AF compatible, F2.8 constant aperture zoom lens for APS-C (as of October 2021, by Sigma)
*2 The values are for L-Mount.
Supports various shooting situations
The Sigma 18-50mm F2.8 DC DN | Contemporary has fast and near-silent AF that makes it perfectly suited to a range of photographic applications, including shooting in quiet environments, recording videos and capturing fast-moving subjects. This has been achieved by using a stepping motor as the AF actuator. Since it is small and lightweight, it can be used flexibly in situations such as handheld shooting, which requires high mobility, gimbal shooting, one-man operation video shooting and vlogging.
Combined with the “Pocketable Full-Frame” SIGMA fp, the total weight is only 712g, and it can also be useful as a sub-lens for full-frame cameras (used in crop mode) to keep weight down. The 18-50mm F2.8 DC DN | Contemporary, which combines compactness, light weight, high performance, and large aperture, supports a variety of shooting situations, from introductory single-lens mirrorless cameras to video shooting and combination with full-frame cameras.
About the minimum focusing distance
With an emphasis on making the lens as versatile as possible in a wide variety of shooting conditions, Sigma designed the lens with a minimum focusing distance of 12.1cm and maximum magnification of 1:2.8*, making it also ideal for close-ups.
*The minimum focusing distance and maximum magnification are both values at the wide end. Remove the lens hood from the lens before use when photographing at the minimum focusing distance at the wide-angle end.
Examples of the lens used in combination with full-frame cameras in APS-C format
Camera Effective Pixels Approx. 61 MP
Crop Setting : 6.2K crop
（Equivalent to approx.1.5 the focal length of the lens）
Still image Recording Pixels : 6,240 × 4,144
Movie Recording Pixels : 3,840 x 2,160 (UHD 4K)
Camera Effective Pixels Approx. 24.6 MP
Crop Setting : APS-C crop
（Equivalent to approx.1.5 the focal length of the lens)
Still image Recording Pixels : 3,840 × 2,560
Movie Recording Pixels : 3,840 x 2,160 (UHD 4K)
LENS CONSTRUCTION
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SLD GLASS
ASPHERICAL LENS
MTF CHART
The MTF (Modulation Transfer Function) is one of the measurements for evaluating a lens’ performance, and it shows how faithfully the contrast of the subject can be reproduced on the image plane. The horizontal axis shows the image height (distance from the center of the image in mm) and the vertical axis shows the contrast value (maximum value is 1).
The closer the 10 line pairs/mm curve is to 1, the higher the contrast and clarity of the lens is, and similarly, the closer the 30 line pairs/mm curve is to 1, the better the resolution and sharpness of the lens is.
*The MTF chart depicts the result at the wide-open aperture.
*For mirrorless lenses that support distortion correction, the horizontal axis shows the image height equivalent to when an L-Mount lens is attached to a Sigma L-Mount camera with distortion correction applied. (The effect of distortion correction may differ depending on the mount and camera used.)
*The spatial frequency indicates the variation on the image plane before distortion correction is performed.
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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
Inner focus system
To increase stability, this lens configuration uses movable internal lens elements that adjust focus without changing the length of the lens barrel.
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.
Compatible with Lens Aberration Correction
Matching the optical characteristics of the lens, this function performs in-camera corrections of peripheral illumination, chromatic aberrations, distortion, and more, to further enhance image quality.
*Function available on supported cameras only. Available corrections or auto correction functionality may vary depending on the camera model.
*On cameras where lens aberration correction is controlled with 'ON' or 'OFF' in the camera menu, please set all aberration correction functions to 'ON'(AUTO).
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.
Mount with Dust and Splash Resistant Structure
The lens mount incorporates rubber sealing to protect the mount from dust and water drops.
Lens construction: 13 elements in 10 groups
Compatible with high-speed autofocus
Support DMF and AF+MF
Petal type lens hood（LH582-02）
Compatible with SIGMA USB DOCK UD-11(sold separately / for L-Mount only)
Designed to minimize flare and ghosting
Every single lens undergoes SIGMA’s proprietary MTF measuring system
7-blade rounded diaphragm
High-precision, durable brass bayonet mount
