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18-35mm F1.8 DC HSM | A (Canon) Sigma 20 2022-09-11
  1. Lenses
  2. Canon EF Mount
  3. Stills Lens Type
  4. Zoom

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

The Sigma 18-35mm F1.8 DC HSM Art is a fascinating lens and one that’s designed for cameras that employ an APS-C size sensor. With a constant aperture of f/1.8 and focal range that’s equivalent to 27-52.5mm, it lets you do what very few zooms allow, which is to shoot at a fast maximum aperture across a practical focal length range without having to switch between multiple prime lenses. It’s constructed to Sigma’s robust standards, however it’s not weather-sealed. It’s also fairly heavy (810g) for its size and balances best with APS-C cameras that have a large handgrip. It’s puts in an exceptional optical performance and produces highly attractive images at f/1.8.

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Our thoughts

'The Sigma 18-35mm F1.8 DC HSM Art is a fascinating lens and one that’s designed for cameras that employ an APS-C size sensor. With a constant aperture of f/1.8 and focal range that’s equivalent to 27-52.5mm, it lets you do what very few zooms allow, which is to shoot at a fast maximum aperture across a practical focal length range without having to switch between multiple prime lenses. It’s constructed to Sigma’s robust standards, however it’s not weather-sealed. It’s also fairly heavy (810g) for its size and balances best with APS-C cameras that have a large handgrip. It’s puts in an exceptional optical performance and produces highly attractive images at f/1.8.'  

 


 

The details

What makes a standard lens ideal for you? Certain important qualities are required, such as fast maximum aperture, versatility for snap shots, portraiture and indoor photography plus a good combination of a wide range of focal lengths in a compact design. 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. This wide aperture, standard zoom lens enables the photographer to expand creative possibilities on any occasion.

Sigma's Art line delivers high-level artistic quality
Sigma is organising all of its interchangeable lenses into three product lines; Contemporary, Art and Sports. Designed with a focus on sophisticated optical performance and abundant expressive power, the Art line delivers high-level artistic expression. Developed with the maximum emphasis on artistic touch, they are designed to meet the expectations of users who value a creative, dramatic outcome above compactness and multifunction. 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, 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 down side 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. SIGMA 18-35mm F1.8 DC HSM is a new generation lens that can deliver images at f1.8 aperture throughout its focal length. If it is compared with a lens of F2.8, the faster shutter speed and the shallower 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.

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 its super wide angle zoom lenses such as SIGMA12-24mm F4.5-5.6 II DG HSM and SIGMA 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 it to develop a wide glass-molded 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 curvature of field 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, it 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 or grad, as the front part of the lens does not rotate.

Designed to minimise flare and ghosting
Flare and ghosting were thoroughly measured and monitored from an early stage in the lens' development 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. 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. Optimising AF algorithm, smoother AF is achieved. It also enables full-time manual focusing capability which allows sensible focus adjustment by simply rotating the focus ring.

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

Design concept
The dedign incorporates 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 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.

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

Description Quantity
iM2075 Flight Case1
Back Cap1
Black Lens Pouch1
72mm U/V Filter1
LH780-06 Lens Hood1
LCF-72 II Lens Cap1
Lens Packaging Note1
Paperwork1

If extremely precise autofocus is required, the Sigma calibration dock will fine-tune the relationship between the specific camera and the specific Sigma lens you are using. For ultra precision, you may also want to hire the Datacolor SpyderLENSCAL calibration chart.

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