Review Lens: Sigma 18-35mm F1.8 DC HSM A Pentax

Lens Overview - Sigma 18-35mm F1.8

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

Distinguished by a uniquely fast and versatile design, the Canon EF-mount Sigma 18-35mm f/1.8 DC HSM is an Art-series zoom, covering wide-angle to normal focal lengths. Separating itself from the pack, this zoom features an exceedingly bright f/1.8 constant maximum aperture, which suits its use in difficult lighting conditions and offers impressive depth of field control throughout the zoom range. The optical design incorporates a series of SLD and aspherical elements, which help to achieve high clarity and sharpness by suppressing various aberrations, color fringing, and distortion. A Super Multi-Layer Coating has also been applied, too, which controls lens flare and ghosting for improved contrast and color accuracy. Balancing the optical merits, this 18-35mm also sports an advanced Hyper Sonic Motor, along with an internal focusing design, to promote fast, quiet, and precise autofocus performance.

As part of the Art line within Sigma's Global Vision series, this lens is designed to achieve truly notable optical performance and is ideally suited for creative and artistic applications.
Wide-to-normal zoom is designed for APS-C-format Canon EF-mount cameras and provides a 28.8-56mm equivalent focal length range.
Impressively bright constant f/1.8 maximum aperture is well-suited for working in low-light conditions and also provides greater control over the focus position when using shallow depth of field techniques.
Five Special Low Dispersion (SLD) elements are featured in the optical design and help to reduce color fringing and chromatic aberrations for improved clarity and color accuracy.
Four aspherical elements are used to help limit distortion and spherical aberrations and also contribute to greater overall sharpness and accurate rendering.
A Super Multi-Layer Coating has been applied to lens elements in order to minimize lens flare and ghosting and contribute to producing contrast-rich and color-neutral imagery, even in backlit conditions.
Integrated HSM (Hyper Sonic Motor), along with an internal focusing system, realizes quick and quiet autofocus, which is further complemented by an optimized AF algorithm to produce smoother focusing performance. The HSM also permits full-time manual focus control simply by rotating the focus ring at any time.
Rounded nine-blade diaphragm contributes to a smooth and pleasing bokeh quality.
Constructed using a Thermally Stable Composite (TSC) material for greater precision and use in wide temperature variations. Additionally, a brass bayonet affords improved mounting accuracy and rigidity.
This lens is compatible with the optional Sigma USB Dock for fine-tuning different lens characteristics and updating its firmware.
UPC: 085126210540

Sigma 18-35mm F1.8 Latest Price



Focal Length18 to 35mm (35mm Equivalent Focal Length: 28.8 to 56mm)
Maximum Aperturef/1.8
Minimum Aperturef/16
Lens MountCanon EF
Format CompatibilityAPS-C
Angle of View76.5° to 44.2°
Minimum Focus Distance11.02" / 28 cm
Maximum Magnification0.23x
Macro Reproduction Ratio1:4.3
Optical Design17 Elements in 12 Groups
Diaphragm Blades9, Rounded
Focus TypeAutofocus
Image StabilizationNone
Filter Size72 mm (Front)
Dimensions (ø x L)3.07 x 4.76" / 78 x 121 mm
Weight1.78 lb / 810 g

Photos Example - Sigma 18-35mm F1.8

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Lens Technical

Sigma 18-35mm F1.8 DC HSM A PentaxNikon NIKKOR Z 85mm f/1.8 S135mm F1.8 GM
Name Sigma 18-35mm F1.8 DC HSM A PentaxNikon NIKKOR Z 85mm f/1.8 SSony FE 135mm F1.8 GM
Max Aperture At Min Focal f/1.8f/1.8f/1.8
Year 201320192019
Mount Type Pentax KAFNikon ZSony FE
Lens Type Lens Superwide,lens Wide,lens MediumLens Medium,lens TelephotoLens Telephoto
Auto Focus NoNoNo
Price $800$800$1900
Lens Zoom ZoomPrimePrime
Lens Range 1885135
Global 49.0239
Effective Mega Pixel 41.4052
Distorsion 0.065
Vignetting -1.08906
Tstop 1.90191
Ac 2.57863
Vignetting Ranking 8037
Tstop Ranking 1749
Ac Ranking 484
Pixel Depth 45.7
Price Sensor 3400
Sensor Raw 45.75
Sensor Format Sensor Fullframe
Type Hybrid
Zoom Factor 111
Weight 1lb1lb1lb
Macro NoNoNo
Launch Date Apr. 2013Jul. 2019Feb. 2019
Brand SigmaNikonSony


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