Sigma 18-35mm f/1.8 DC HSM

Sigma 18-35mm f/1.8 DC HSM

Lens Summary

Brand: Sigma
Also Known As: Sigma 18-35mm f/1.8
Lens Type: Zoom Lens
Format: APS-C / DX
Focus: Autofocus
Lens Mount: Canon EF, Nikon F, Pentax K, Sigma SA, Sony Alpha
Release Date: 04/18/2013
MSRP Price: $799 (Check Current Price)
Made in: Japan
Infrared Rating: Good
Production Status: In Production

Lens Description: The Sigma 18-35mm f/1.8 DC HSM is the first zoom lens ever to achieve a maximum aperture of f/1.8 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 27mm - 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.
Photography Life Review Summary: Overall, I am very impressed by the performance of the Sigma 18-35mm f/1.8 DC HSM. It is certainly a game changer, not only because it is the first f/1.8 zoom lens in history, but also because it is a stellar performer. I cannot wait to see more lenses like this from Sigma in the future. If I owned a DX / APS-C camera, the Sigma 18-35mm f/1.8 would have been one of my first candidates for everyday photography. Read the full Sigma 18-35mm f/1.8 DC HSM Review by Photography Life.

Sigma 18-35mm f/1.8 DC HSM Specifications

Lens Specifications
Lens TypeZoom Lens
Focal Length18-35mm
Mount TypeCanon EF, Nikon F, Pentax K, Sigma SA, Sony Alpha
FormatAPS-C / DX
Compatible Format(s)APS-C / DX
Compatible with TeleconvertersNo
Zoom Ratio1.94x
Vibration Reduction / Image StabilizationNo
Aperture Information
Aperture RingNo
Maximum Aperturef/1.8
Minimum Aperturef/16
Optical Information
Lens Elements17
Lens Groups12
Diaphragm Blades9
ED Glass Elements5 SLD glass elements
Aspherical Elements4 glassmold aspherical elements, 5 SLD glass elements
Nano CoatingNo
Super Integrated / Super Spectra / T* CoatingNo
Focus Information
Built-in Focus MotorYes
Silent Wave / Ultrasonic MotorYes
Internal FocusingYes
Rear FocusingNo
Minimum Focus Distance0.28m
Distance InformationYes
Filter Information
Filter Size72mm
Accepts Filter TypeScrew-on
Physical Characteristics
Weather / Dust SealingNo
Mount MaterialMetal
Tripod CollarNo
Dimensions78 x 121mm
Other Information
Available in ColorsBlack

Lens Construction

Sigma 18-35mm f/1.8 DC HSM Lens Construction

MTF Chart

Sigma 18-35mm f/1.8 DC HSM MTF Chart

MTF Performance

Here is how the lens performed according to Imatest:

The lens shows very impressive performance at 18mm both in the center and in the mid-frame. The corner performance is a little weaker, but regains sharpness at just f/2.8. Peak performance is reached at f/2.8, which is remarkable.

The performance at 24mm is even more impressive, yielding very high levels of mid-frame and corner performance. Peak performance is again reached at f/2.8.

Although the center performance drops a tad, mid-frame and corners look the best at 35mm, so there is more balance of sharpness across the frame.


Distortion levels are moderate. At 18mm, there is barrel distortion of -1.25%, which changes to pincushion distortion when zoomed in towards 24mm. Pincushion distortion is at its strongest level at 35mm, where it reaches about 1.52%, as shown in the graph below:

Chromatic Aberration

Lateral chromatic aberration levels are pretty moderate at short focal lengths, averaging a little over a pixel. As you zoom in, CA levels drop and reach their lowest at 35mm:


Vignetting levels are very low for an f/1.8 lens. That’s another surprising find, as I initially expected to see much worse vignetting throughout the focal range. Wide open at 18mm, vignetting is only at about 1.39 stops and it increases as you zoom in towards 35mm. At the long end, vignetting reaches about 1.65 stops, which is still very impressive:

Sample Images

Sigma 18-35mm f/1.8 Sample Image (46) Sigma 18-35mm f/1.8 Sample Image (45)

Sigma 18-35mm f/1.8 Sample Image (44) Sigma 18-35mm f/1.8 Sample Image (31)

Sigma 18-35mm f/1.8 Sample Image (37) Sigma 18-35mm f/1.8 Sample Image (24)

Sigma 18-35mm f/1.8 Sample Image (18) Sigma 18-35mm f/1.8 Sample Image (14)

Sigma 18-35mm f/1.8 Sample Image (1) Sigma 18-35mm f/1.8 Sample Image (3)


  1. May 12, 2013 at 3:20 am

    Interesting when I read this article by Thom Hogan .. perhaps Sigma read it too

    Thom mentions in that artice what the DX format need is a 20-35mm lens, Sigma got pretty darn close. I think Sigma might be on a winner here.

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