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Sigma 18-35mm F1.8 DC HSM Pentax KAF Review

Sigma 18-35mm F1.8 DC HSM

Main Features

  • 18-35mm Focal Range
  • F1.8 Max Aperture
  • Filter Thread: 72mm
  • Max Format: APS-C / DX
  • Pentax KAF Mount
  • Weight: 810g.
  • Diameter: 78mm
  • Length: 121mm
  • Min Focus Distance:0.28m
  • Max Magnification:0.23x
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Sigma 18-35mm F1.8 DC HSM Overview

Sigma 18-35mm F1.8 DC HSM is a Fixed aperture Auto Focus (AF) Standard Zoom lens with APS-C / DX max sensor coverage, and it is designed to be used with Pentax KAF mount cameras.

What type of photography is the Sigma 18-35mm F1.8 DC HSM lens good for?

The type of photography that you are planning to use the Sigma 18-35mm F1.8 DC HSM is an important decision factor. Here we have evaluated its suitability to various photography scenarios:

Photography Type Suitability
Bird/WildlifeFair
SportsAverage
PortraitVery Good
TravelVery Good
StreetVery Good
WeddingVery Good
Walk AroundVery Good
VloggingVery Good
LandscapeVery Good
MacroFair

Reasons to Buy Sigma 18-35mm F1.8 DC HSM Lens

Here, we've included a summary of the advantages and disadvantages of the Sigma 18-35mm F1.8 DC HSM lens in a list form to help you determine whether it offers the features you need.

PROs
Autofocus
Distance Scale
Hood supplied
Full-time Manual Focusing
Internal Focusing
Fast Aperture at Wide end
Fast Aperture at Tele end
Constant f1.8 aperture throughout the range
9 Diaphragm Blades
Minimum focus distance of 0.28m / 11.0 inch
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Buy Sigma 18-35mm F1.8 DC HSM from Amazon or B&H PHOTO


CONs
No Weather Sealing

Lens Mount

Sigma 18-35mm F1.8 DC HSM is compatible with cameras that have Pentax KAF lens mount. Some of the latest released cameras that are compatible with the Pentax KAF lenses are Pentax KF, Pentax K-3 III and Pentax KP.

Sigma 18-35mm F1.8 DC HSM is also available in Canon EF , Sony Alpha, Sigma SA and Nikon F (DX) mounts.

Size, Weight and Filter Thread

Size and weight is a very important decision factor when searching for your next lens. Sigma 18-35mm F1.8 DC HSM has a maximum diameter of 78mm and total length of 121mm. It weighs 810g / 28.6 oz.

Sigma 18-35mm F1.8 DC HSM has a filter thread of 72mm.

Focal Range

Sigma 18-35mm F1.8 DC HSM has a focal range of 18-35mm and 1.9X zoom ratio which has a 35mm equivalent focal range of 27-52.5mm when used on a APS-C / DX format camera.

Optical Image Stabilization

Sigma 18-35mm F1.8 DC HSM doesn't have an optical image stabilization system so the only option to stabilize the image taken with this lens is to mount on a camera body with IBIS (sensor based In-body image stabilization).

Zoom Method

Sigma 18-35mm F1.8 DC HSM features Rotary (internal) zoom method where the length of the lens doesn't change while you are zooming in or out. Even though this design has a size disadvantage in general compare to extending designs, it has the benefits of better sealing against dust and moisture, no zoom creep and no weight balance shift while zooming.

Maximum Magnification Ratio

Sigma 18-35mm F1.8 DC HSM has a Max Magnification Ratio of 0.23x and has a minimum focusing distance of 0.28m.

Aperture

Sigma 18-35mm F1.8 DC HSM is a fixed aperture lens with a constant max aperture of f1.8 from 18mm all the way to the 35mm .

Focal Length Max Aperture Min Aperture
18mm F1.8 F16
35mm F1.8 F16

Optical Formula

Sigma 18-35mm F1.8 DC HSM's optical formula consists of 17 elements in 12 groups . Following special elements are used in this design:

  • 5 SLD glass elements
  • 4 glassmold aspherical elements

Lens Hood

Sigma 18-35mm F1.8 DC HSM comes with a removable lens hood which is handy to reduce lens flare and glare in your photos. The model number of the hood is LH780-03.

Body Colour

Sigma 18-35mm F1.8 DC HSM is available in Black color.

Popular Comparisons of Sigma 18-35mm F1.8 DC HSM

Here is the eight most popular comparisons of Sigma 18-35mm F1.8 DC HSM amongst Camera Decision readers.

Top Alternatives of Sigma 18-35mm F1.8 DC HSM Lens
Model Coverage Weight Focusing Street Price
HD PENTAX-D FA 15-30mm F2.8 ED SDM WR Lens HD PENTAX-D FA 15-30mm F2.8 ED SDM WR
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35mm FF 1040gr AF Amazon B&H Photo
Sigma 17-50mm F2.8 EX DC OS HSM Lens Sigma 17-50mm F2.8 EX DC OS HSM
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APS-C / DX 565gr AF Amazon B&H Photo
Tamron AF 28-80mm F3.5-5.6 Aspherical Lens Tamron AF 28-80mm F3.5-5.6 Aspherical
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35mm FF 237gr AF Amazon B&H Photo
Sigma 24-70mm F2.8 EX DG Macro Lens Sigma 24-70mm F2.8 EX DG Macro
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35mm FF 715gr AF Amazon B&H Photo
HD Pentax-DA 20-40mm F2.8-4 ED Limited DC WR Lens HD Pentax-DA 20-40mm F2.8-4 ED Limited DC WR
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APS-C / DX 283gr AF Amazon B&H Photo
Pentax smc DA 18-55mm F3.5-5.6 AL Lens Pentax smc DA 18-55mm F3.5-5.6 AL
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APS-C / DX 225gr AF Amazon B&H Photo
Pentax smc DA 18-55mm F3.5-5.6 AL WR Lens Pentax smc DA 18-55mm F3.5-5.6 AL WR
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APS-C / DX 230gr AF Amazon B&H Photo
Pentax smc DA 18-55mm F3.5-5.6 ED AL II IF Lens Pentax smc DA 18-55mm F3.5-5.6 ED AL II IF
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APS-C / DX 220gr AF Amazon B&H Photo

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**This post contains affiliate links and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.

Sigma 18-35mm F1.8 DC HSM Alternatives in Pentax KAF Mount
Model Coverage Weight Focusing Street Price
HD Pentax-DA 20-40mm F2.8-4 ED Limited DC WR Lens HD Pentax-DA 20-40mm F2.8-4 ED Limited DC WR
Compare
APS-C / DX 283gr AF Amazon B&H Photo
HD PENTAX-D FA 15-30mm F2.8 ED SDM WR Lens HD PENTAX-D FA 15-30mm F2.8 ED SDM WR
Compare
35mm FF 1040gr AF Amazon B&H Photo

Sigma 18-35mm F1.8 DC HSM Detailed Specifications


General
Brand Sigma
Lens Type Zoom
Lens Type Standard Zoom
Lens Mount Pentax KAF
Max Format APS-C / DX
Focal Range 18-35mm
Image Stabilization No
Colour Black
Zoom Method Rotary (internal)
Power Zoom No Zoom
Zoom Lock No Zoom
Zoom Ratio 1.9X
APERTURE
Max Aperture F1.8
Min Aperture F16.0
Aperture Ring No
Diaphragm Blades 9
Optics
Optical Elements 17
Optical Groups 12
Special Elements 5 SLD glass elements, 4 glassmold aspherical elements

FOCUSING
Min Focus Distance 0.28m
Max Magnification 0.23X
Autofocus Yes
AF Motor Type Ring-type ultrasonic
Full Time Manual Yes
Focus Method Internal
Distance Scale Yes
DoF Scale No
PHYSICAL SPECS
Weight 810g
Diameter 78mm
Length 121mm
Weather Sealing No
Filter Thread 72mm
Filter Notes -
Hood Supplied Yes
Hood Code LH780-03
Tripod Collar No
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Frequently Asked Questions about Sigma 18-35mm F1.8 DC HSM
is the Sigma 18-35mm F1.8 DC HSM a Weather Sealed lens?
What is the Minimum Focusing Distance of Sigma 18-35mm F1.8 DC HSM
is the Sigma 18-35mm F1.8 DC HSM an Autofocus (AF) lens?
What is the Filter Thread Size of Sigma 18-35mm F1.8 DC HSM
Does Sigma 18-35mm F1.8 DC HSM have Image Stabilization?
Does Sigma 18-35mm F1.8 DC HSM have Aperture Ring?
What is the Maximum Magnification Ratio of Sigma 18-35mm F1.8 DC HSM
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