Sigma 18-35mm F1.8 DC HSM | A - Canon Fit

Sigma 18-35mm F1.8 DC HSM | A - Canon Fit

Why buy the Sigma 18-35mm F1.8 DC HSM | A?

The first lens of its kind to achieve a fast f1.8 maximum aperture throughout the zoom range. The Sigma 18-35mm gives you great control over depth of field and allows you to gather a huge amount of light, capturing greater detail and boosting image quality.

 
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MPN Code 210954
EAN Code 085126210540
SKU 7654-1061-5257

Sigma 18-35mm F1.8 DC HSM | A

What makes a standard lens ideal for you?

Certain important qualities are required, such as a fast maximum aperture, versatility for snapshots, portraiture and indoor photography plus a good combination of a wide range of focal lengths in a compact design. The Sigma 18-35mm F1.8 DC HSM is the first zoom lens ever to achieve a maximum aperture of f1.8 throughout the zoom range. It is a wide aperture, standard zoom-lens for digital single-lens reflex cameras with APS-C size sensors. The lens has a focal range equivalent to 27-52.5mm in a 35mm format and it can cover the angles of view of multiple fixed focal length lenses. This wide aperture, standard zoom lens enables the photographer to expand creative possibilities on any occasion.


Art line for high-level artistic quality

Designed with a focus on sophisticated optical performance and abundant expressive power, Sigma's Art line delivers high-level artistic expression. Developed with the maximum emphasis on artistic touch, this lens is designed to meet the expectations of users who value a creative, dramatic outcome above compactness and multifunction. Along with landscapes, portraits, still-life, close-ups and casual snaps, this is perfect for the kind of photography that unleashes the inner artist. Ideal for studio photography, this lens offers just as much expressive scope when capturing architecture, starry skies, underwater shots and many other scenes.


Excellent Usability

A zoom lens is very convenient as it offers various angles of view just by rotating the zoom ring. However, the downside was that no zoom lens ever offered a faster aperture than f2.8 which led photographers to select fixed focal length lenses for brighter images. While the aperture value of prime lenses is superior to zoom lenses, their field of view is always the same, and therefore it was always necessary to carry many fixed focal length lenses. The Sigma 18-35mm F1.8 DC HSM is a new generation lens that can deliver images at f1.8 aperture throughout its focal length. The bright viewfinder is very helpful for checking the focus and composition of the image. If it is compared with a lens of F2.8, the faster shutter speed and the shallow depth of field of F1.8 further expands creativity. From wide to standard range this lens offers the excellent versatility and performance of multiple fixed focal length lenses.


Fruit of cutting edge technology

To achieve a wide zoom lens with a maximum aperture of f1.8, various technical problems need to be overcome. As the aperture value gets larger, the depth of focus becomes shallower, thus it makes the lens design extremely complicated in order to compensate for various distortions, such as spherical, axial chromatic and astigmatic aberration along with curvature of field.

In order to compensate for astigmatic aberration across the entire focal range, Sigma has relied on the experience and know-how gained when designing their super wide-angle zoom lenses such as the 8-16mm F4.5-5.6 DC HSM. In addition, the technological innovation at Sigma's Aizu factory also contributes to better lens production. It has enabled the development of a wide glass-moulded aspheric lens, and the incorporation of SLD (Special Low Dispersion) glass has optimised power distribution of the optical elements and compensated for various aberrations as well as field curvature at the widest angle. Thanks to Sigma's knowledge of lens design accumulated over a long period of time plus the latest lens manufacturing techniques, Sigma has finally made the dream of a zoom lens with F1.8 throughout its entire focal range come true.


Convenient handling

Convenient handling is achieved by incorporating internal focusing and zooming which prevents any change in the length of the lens when focusing and zooming. It is possible to use a specialist filter, such as a Circular Polariser, as the front part of the lens does not rotate.


Designed to minimize flare and ghosting

Flare and ghosting were thoroughly measured and monitored from an early stage in the lens' development to establish an optical design that 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. Attaching the matched petal type hood, which is supplied, will provide extra protection from flare and ghosting.


Minimum focusing distance of 28cm

With a minimum focusing distance of 28cm and a maximum magnification ratio of 1:4.3, this lens is excellent for close-up photography.


Hyper Sonic Motor

The HSM (Hyper Sonic Motor) ensures a silent, high-speed AF function. By optimising the AF algorithm, a smoother AF is achieved. It also enables full-time manual focusing capability which allows sensible focus adjustment by simply rotating the focus ring.


Rounded diaphragm

The 9-blade rounded diaphragm creates an attractive round bokeh at large-aperture settings.


Design concept

The new product lines incorporate rubber for the attachment part of the provided lens hood. For better usability, the designs of the lens cap and AF/MF changeover switch have been improved. In order to ensure the high accuracy of the product, all metallic parts and the new compound material, TSC (Thermally Stable Composite), which has a high affinity to metal parts, are housed internally. On the lens barrel, the last three digits of its release year are engraved so the lens can be identified according to the year of its launch. 


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.


Newly developed USB DOCK exclusively for new product lines

Attaching the lens to an optional USB DOCK plugged into your computer and using dedicated software Sigma Optimization Pro, you can update the lens firmware and adjust parameters such as focus.


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 their own proprietary MTF (modulation transfer function) measuring system (A1) using Foveon 46-megapixel direct image sensors. Even previously undetectable high-frequency details are now within the scope of their quality control inspections. All Sigma 18-35mm F1.8 DC HSM lenses will all be checked using A1 before they are shipped.


What's in the box?

  • Sigma 18-35mm F1.8 DC HSM | A
  • Front and Rear Lens Caps
  • Case
  • Petal Type Lens hood (LH780-06)

Want to learn more?

Read the PhotoPlus Magazine Review - Click Here


Specifications

Lens Construction: 17 elements in 12 groups

Minimum aperture: F16

Filter size: ø72mm

Angle of view (SD1): 76.5°-44.2°

Minimum focusing distance: 28cm/11.0in.

Dimensions (Diameter x Length): ø78mm x 121.0mm/3.1in. x 4.8in.

Number of diaphragm blades: 9 (Rounded diaphragm)

Maximum magnification ratio: 1:4.3

Weight: 810g/28.6oz

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