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Sigma 24-70mm F2.8 EX DG HSM Pentax KAF3 Review

Sigma 24-70mm F2.8 EX DG HSM

Main Features

  • 24-70mm Focal Range
  • F2.8 Max Aperture
  • Filter Thread: 82mm
  • Max Format: 35mm FF
  • Pentax KAF3 Mount
  • Weight: 790g.
  • Diameter: 89mm
  • Length: 95mm
  • Min Focus Distance:0.38m
  • Max Magnification:0.19x
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Sigma 24-70mm F2.8 EX DG HSM Overview

Sigma 24-70mm F2.8 EX DG HSM is a Fixed aperture Auto Focus (AF) Standard Zoom lens with 35mm FF max sensor coverage, and it is designed to be used with Pentax KAF3 mount cameras.

What type of photography is the Sigma 24-70mm F2.8 EX DG HSM lens good for?

The type of photography that you are planning to use the Sigma 24-70mm F2.8 EX DG 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
MacroPoor

Reasons to Buy Sigma 24-70mm F2.8 EX DG HSM Lens

Here, we've included a summary of the advantages and disadvantages of the Sigma 24-70mm F2.8 EX DG HSM lens in a list form to help you determine whether it offers the features you need.

PROs
Autofocus
Distance Scale
DoF(Depth of Field) Scale
Hood supplied
Full-time Manual Focusing
Fast Aperture at Wide end
Fast Aperture at Tele end
Constant f2.8 aperture throughout the range
Covers Full-Frame Sensor
9 Diaphragm Blades
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Buy Sigma 24-70mm F2.8 EX DG HSM from Amazon or B&H PHOTO


CONs
No Weather Sealing
Lens Extents while zooming

Lens Mount

Sigma 24-70mm F2.8 EX DG HSM is compatible with cameras that have Pentax KAF3 lens mount. Some of the latest released cameras that are compatible with the Pentax KAF3 lenses are , and .

Sigma 24-70mm F2.8 EX DG HSM is also available in Canon EF , Sony Alpha, Sigma SA and Nikon F (FX) mounts.

Size, Weight and Filter Thread

Size and weight is a very important decision factor when searching for your next lens. Sigma 24-70mm F2.8 EX DG HSM has a maximum diameter of 89mm and total length of 95mm when not extended . It weighs 790g / 27.9 oz.

Sigma 24-70mm F2.8 EX DG HSM has a filter thread of 82mm.

Focal Range

Sigma 24-70mm F2.8 EX DG HSM has a focal range of 24-70mm and 2.9X zoom ratio. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 36 - 105mm.

Optical Image Stabilization

Sigma 24-70mm F2.8 EX DG 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 24-70mm F2.8 EX DG HSM features Rotary (extending) zoom method where the length of the lens changes as you zoom in or out. This makes it possible to design the lens with a smaller minimum length ( generally when it is zoomed out) compared to internal zoom lenses. The disadvantages of this design are being harder to seal against dust and moisture, weight balance shifting while zooming and zoom creep in certain lenses.

Maximum Magnification Ratio

Sigma 24-70mm F2.8 EX DG HSM has a Max Magnification Ratio of 0.19x and has a minimum focusing distance of 0.38m.

Aperture

Sigma 24-70mm F2.8 EX DG HSM is a fixed aperture lens with a constant max aperture of f2.8 from 24mm all the way to the 70mm .

Focal Length Max Aperture Min Aperture
24mm F2.8 F22
70mm F2.8 F22

Optical Formula

Sigma 24-70mm F2.8 EX DG HSM's optical formula consists of 14 elements in 12 groups . Following special elements are used in this design:

  • 1 ELD glass element
  • 2 SLD glass elements
  • 3 Aspherical elements

Lens Hood

Sigma 24-70mm F2.8 EX DG HSM comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.

Popular Comparisons of Sigma 24-70mm F2.8 EX DG HSM

Here is the eight most popular comparisons of Sigma 24-70mm F2.8 EX DG HSM amongst Camera Decision readers.

Top Alternatives of Sigma 24-70mm F2.8 EX DG HSM Lens
Model Coverage Weight Focusing Street Price
HD Pentax D FA 24-70mm F2.8 ED SDM WR Lens HD Pentax D FA 24-70mm F2.8 ED SDM WR
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35mm FF 787gr AF Amazon B&H Photo
Tamron AF 28-75mm F2.8 XR Di LD Aspherical IF Lens Tamron AF 28-75mm F2.8 XR Di LD Aspherical IF
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35mm FF 510gr 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
Panasonic Lumix S Pro 24-70mm F2.8 Lens Panasonic Lumix S Pro 24-70mm F2.8
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35mm FF 935gr AF Amazon B&H Photo
Tamron SP 24-70mm F2.8 Di VC USD Lens Tamron SP 24-70mm F2.8 Di VC USD
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35mm FF 825gr 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
Canon EF-S 15-85mm f3.5-5.6 IS USM Lens Canon EF-S 15-85mm f3.5-5.6 IS USM
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APS-C / DX 575gr AF Amazon B&H Photo
Sony Vario-Sonnar T 24-70mm F2.8 ZA SSM II Lens Sony Vario-Sonnar T 24-70mm F2.8 ZA SSM II
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35mm FF 974gr 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 24-70mm F2.8 EX DG HSM Detailed Specifications


General
Brand Sigma
Lens Type Zoom
Lens Type Standard Zoom
Lens Mount Pentax KAF3
Max Format 35mm FF
Focal Range 24-70mm
Image Stabilization No
Colour Unknown
Zoom Method Rotary (extending)
Power Zoom No Zoom
Zoom Lock No Zoom
Zoom Ratio 2.9X
APERTURE
Max Aperture F2.8
Min Aperture F22.0
Aperture Ring No
Diaphragm Blades 9
Optics
Optical Elements 14
Optical Groups 12
Special Elements 1 ELD glass element 2 SLD glass elements 3 Aspherical elements

FOCUSING
Min Focus Distance 0.38m
Max Magnification 0.19X
Autofocus Yes
AF Motor Type Ring-type ultrasonic
Full Time Manual Yes
Focus Method Internal
Distance Scale Yes
DoF Scale Yes
PHYSICAL SPECS
Weight 790g
Diameter 89mm
Length 95mm
Weather Sealing No
Filter Thread 82mm
Filter Notes Does not rotate on focusing
Hood Supplied Yes
Tripod Collar No
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Frequently Asked Questions about Sigma 24-70mm F2.8 EX DG HSM
is the Sigma 24-70mm F2.8 EX DG HSM a Weather Sealed lens?
What is the Minimum Focusing Distance of Sigma 24-70mm F2.8 EX DG HSM
is the Sigma 24-70mm F2.8 EX DG HSM an Autofocus (AF) lens?
What is the Filter Thread Size of Sigma 24-70mm F2.8 EX DG HSM
Does Sigma 24-70mm F2.8 EX DG HSM have Image Stabilization?
Does Sigma 24-70mm F2.8 EX DG HSM have Aperture Ring?
What is the Maximum Magnification Ratio of Sigma 24-70mm F2.8 EX DG HSM
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