Sigma 18-35mm f/1.8 DC HSM Lens for Pentax

Model #210-109

USA Version
Sigma 210 109 1
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Weight 1.78 lb (811 g)
Filter thread Front: 72 mm
Dimensions (dxl) Approx. 3.07 x 4.76" (78 x 121 mm)


Angle of view 76.5° - 44.2°
Groups/elements 12/17
Diaphragm blades 9
Aperture Maximum: f/1.8
Minimum: f/16
Minimum focus distance 11" (27.94 cm)
Camera mount type Pentax K
Maximum reproduction ratio 1:4.3
Format compatibility Pentax Digital (APS-C)
Focal length 18 - 35 mm
Comparable 35mm Focal Length: 27 - 52.5 mm


Autofocus Yes
Image stabilization No
Expert Reviews
19 April 2014

The high price and short focal length make Sigma's 18-35mm F1.8 DC HSM a niche lens, but it'll deliver high-quality images that justify the price.

  • +

    Terrific image quality., Wide f/1.8 aperture, Snappy autofocus

  • -

    Short zoom doesn't do much., May be overkill for APS-C users., Flaky lens cap .

Dp review.32823956
2 September 2013

The Sigma 18-35mm F1.8 DC HSM is an extraordinary lens, offering prime-level image quality in the fastest zoom ever made for SLRs. Its 28-50mm equivalent range is a little limiting though, and inconsistent autofocus means that it can be difficult to make the most of the excellent optics when...

  • +

    Super fast constant F1.8 maximum aperture, Excellent optics, even wide open, Fast, silent autofocus, Solid build quality without being over-heavy, Compatible with Sigma's USB dock and Optimization Pro software

  • -

    Restricted zoom range, Needs detailed AF microadjustment for best results, Inconsistent autofocus in difficult conditions even after microadjustment, Physically rather large for a standard zoom

What digital camera.32818507
12 September 2013

Ground-breaking f/1.8 maximum aperture wide-angle zoom for APS-C DSLRs gets a workout

  • +

    f/1.8 maximum aperture, Excellent image quality, Full-time MF option, Very good sharpness

  • -

    Not full-frame coverage, Somewhat weighty, Modest 2x zoom range

3 November 2014

Ever since the industry-shattering announcement of the Sigma 18-35mm F1.8 HSM "Art," we couldn't wait to get our hands on a copy. Month after month of delays and pushed back release dates it finally arrived, and what an exciting time it was.

  • +

    Constant F1.8 aperture throughout zoom range, Excellent build quality throughout the lens' construction, Large focus and zoom rings are perfectly dampened and easy to find and grasp, Capable of shallow-depth of field wide angle portraits, The only fast and wide angle solution for Pentax's many...

  • -

    Not weather-sealed despite excellent build quality and both internal zoom and focusing, Dreadful autofocus accuracy when using PDAF (looking through viewfinder), Bokeh can be jarring with highlights, producing "frog-egg" or "donut" ring bokeh, Stark color, temperature, and contrast shift from wide...

15 April 2014

Sigma’s 18-35mm f/1.8 DC HSM is part of their DC series of lenses designed for APS-C-sized sensors so the imaging circle is matched to the size of the sensor. For this assignment, I used a Canon EOS 60D with a 22.3x14.9mm sensor, producing an equivalent angle of view of a 28-56mm lens.

The digital picture.34755376
12 August 2013

The word "groundbreaking" seems inadequate for describing the awesomeness of the Sigma 18-35mm f/1.8 DC HSM Art Lens. The primary reason for that awesomeness is the not-seen-in-any-other-zoom-lens f/1.8 aperture.

Photo net.34752471
8 October 2013

The Sigma 18-35mm f/1.8 is a true game changer. I may not be a technical guru, but I love to snap pictures. I use my camera every day, and am always looking for new, incredible equipment that enhances my ability to capture a moment.

Photography bay.33575659
19 February 2014

The Sigma 18-35mm f/1.8 DC HSM lens is built for APS-C format cameras, providing a 27-52.5mm equivalent full frame field of view. At 1.78 lbs, the lens is not quite a bear; however, you’ll definitely notice an increase and size and weight from other variable aperture zoom lenses built for APS-C...

Pop photo.32824722
13 November 2013

When the announcement of Sigma’s new 18–35mm lens arrived, some of our staffers chuckled upon opening the e-mail. Why? Because of what appeared to be a typo in the headline: Instead of f/2.8, it quoted f/1.8 as the maximum aperture!

14 September 2013

Handling and features This much anticipated standard zoom lens for APS-C format cameras sports a fast f/1.8 maximum aperture throughout the zoom range and silent internal focusing with full time manual override.

User Reviews
Imaging resource.34355410
25 April 2016

This lens is SHARP! It's a must have lens for anyone does indoor photography. When it's wide open at F1.8, background blur (I refused to use the word bokeh; much like I now refuse to drink IPA. Both are sooo over used and abused) is soft ad velvety.

  • +

    Good Build quality, Sharp, reasonable price, soft velvety background blur.

  • -

    Bit heavier then I expected.

8 January 2016

This lens enable high speed action to be photographed in low light situations. Whether I am shooting as The Digital Eye, LLC, or as a dad at a diving meet, when I cannot use a flash in low light - this is the lens.

17 August 2015

I rented this lens for a week and found it to be a mixed bag on par with the reviews I had read both good and bad. I evaluated the Sigma 18-35 1.8 on my Nikon D7200. When everything manages to click with this lens it takes breathtakingly sharp and beautiful images.

Photography review.34752477
8 June 2014

This is a classy lens for APS sensor cameras in every way. Build quality is first rate with smooth zoom and focusing action. It is a perfect match for my Canon 70D (or a 7D) Image quality stopped down is razor sharp with virtually no distortion or vignetting.

  • +

    Excellent build and image quality

  • -

    One needs to use this lens with care due to the shallow depth of field.

Lenstip com.34355424
2 December 2016

I never thought I'd experience a lens like this in my lifetime. I've been shooting seriously for 50 years, much of it on Leica M and Nikon gear. I've never seen resolution, microcontrast and colour like this.

  • +

    Everything but the weight.

  • -

    The weight, I guess.

Lenstip com.34355424
2 November 2016

I bought this lens for my A77 and was very disappointed 'cause the AF was very unreliable, OK for people, but horrible for landscape. Tried to fix it with the Sigma docking station, but that only works if you have a clear front- or back-focus on the lens and you don't have the possibility to correct...

  • +

    fast/bright lens, very sharp, great built quality, nice bokeh AF on mirror-less cameras (with LA EA3 on the A6300, BUT only in AF-C mode) is very reliable, even in dim light (with the iris open)

  • -

    Slow focus (but for an 18-35mm f1.8 which i do not intend to use for sports, it's OK), CA (but as I shoot raw, no problem in post processing), weight (again, it's an f1.8 lens, it simply can't be that lightweight) Focusing on SLR (those with that clapping mirror) is inaccurate, not correctable with...

Lenstip com.34355424
29 October 2016

I comparison with 18-105, Nikon is faster to acquire focus and it is sharp always. On 300 fotos 1 is a miss. Sigma miss 40-60% photos. If you shoot lowlight or some parties, don't buy this lens.

  • +

    Color is better then Nikon 18-105 and thats all. And it has classy look, nothing more.

  • -

    1.Very slow autofocus, sometimes very accurate, but most of the times no focus at all (and I know how to use it believe me). It's very bad in poor light, hard to acquire focus and when it do acquire it will be wrong focus.

Lenstip com.34355424
18 August 2016

It is a very good lens, but less useful than expected. The short zoom range does not allow to take it as single lens for any trip, as one usually needs both wider and longer as well. To take it with many other lenses makes the bag too heavy. Excellent for use at home.

  • +

    Image quality excellent, equal or better than prime lenses. Good for a lot of situations. Excellent in low light.

  • -

    Big and heavy, but understandable for 1.8.

29 April 2016

This lens works perfect with the GH4. I will be getting another soon!

9 April 2016

I bought this for a quick hit lens for my Blackmagic URSA Mini. So far, I love it!

Product Highlights
  • Aperture Range: f/1.8-16
  • Fast Constant Maximum Aperture
  • Designed for APS-C-Sized Sensors
  • 35mm Equivalent Focal Length: 27-52.5mm
  • Hyper Sonic AF Motor
  • Internal Focusing and Zoom Design
  • Four Aspherical & 5 SLD Glass Elements
  • Super Multi-Layer Coating
  • Pentax K Lens Mount
Average Expert Score
Average User Score
In The Box
  • Sigma 18-35mm f/1.8 DC HSM Art Lens for Pentax
  • Petal-Type Lens Hood
  • Front Lens Cap
  • Rear Lens Cap
  • Pouch
  • Limited 1-Year North and South America Warranty Against Manufacturing and Workmanship Defects.
  • Limited 3-Year U.S.A. Extended Warranty Extension Against Manufacturing and Workmanship Defects.
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