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Sigma 24-70mm F2.8 EX DG Macro Pentax KAF Review

Sigma 24-70mm F2.8 EX DG Macro

Main Features

  • 24-70mm Focal Range
  • F2.8 Max Aperture
  • Filter Thread: 82mm
  • Max Format: 35mm FF
  • Pentax KAF Mount
  • Weight: 715g.
  • Diameter: 89mm
  • Length: 116mm
  • Min Focus Distance:0.4m
  • Max Magnification:0.26x
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Sigma 24-70mm F2.8 EX DG Overview

Sigma 24-70mm F2.8 EX DG 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 KAF mount cameras.

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

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

Lenses in Pentax KAF Mount with Same Focal and Aperture Range
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
Compare
35mm FF 787gr AF Amazon B&H Photo
Sigma 24-70mm F2.8 EX DG HSM Lens Sigma 24-70mm F2.8 EX DG HSM
Compare
35mm FF 790gr AF Amazon B&H Photo

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

Here, we've included a summary of the advantages and disadvantages of the Sigma 24-70mm F2.8 EX DG Macro 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
Fast Aperture at Wide end
Fast Aperture at Tele end
Constant f2.8 aperture throughout the range
Covers Full-Frame Sensor
9 Diaphragm Blades
Report a correction

Buy Sigma 24-70mm F2.8 EX DG from Amazon or B&H PHOTO


CONs
No Weather Sealing
Lens Extents while zooming

Lens Mount

Sigma 24-70mm F2.8 EX DG 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 K-1 II.

Sigma 24-70mm F2.8 EX DG 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 has a maximum diameter of 89mm and total length of 116mm when not extended . It weighs 715g / 25.2 oz.

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

Focal Range

Sigma 24-70mm F2.8 EX DG 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 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 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 has a Max Magnification Ratio of 0.26x and has a minimum focusing distance of 0.4m. For a non-macro lens, the 0.26x is considered a high magnification and will come handy for close-up shots.

Aperture

Sigma 24-70mm F2.8 EX DG 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 F32
70mm F2.8 F32

Optical Formula

Sigma 24-70mm F2.8 EX DG's optical formula consists of 14 elements in 13 groups . Following special elements are used in this design:

  • 2 Special Low Dispersion (SLD) glass
  • elements 3 aspherical elements

Lens Hood

Sigma 24-70mm F2.8 EX DG 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

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

Top Alternatives of Sigma 24-70mm F2.8 EX DG 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
Compare
35mm FF 787gr AF Amazon B&H Photo
Tamron SP 24-70mm F2.8 Di VC USD G2 Lens Tamron SP 24-70mm F2.8 Di VC USD G2
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35mm FF 905gr 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
Compare
35mm FF 510gr AF Amazon B&H Photo
Sigma 24-70mm F2.8 EX DG HSM Lens Sigma 24-70mm F2.8 EX DG HSM
Compare
35mm FF 790gr AF Amazon B&H Photo
Sigma 18-35mm F1.8 DC HSM Lens Sigma 18-35mm F1.8 DC HSM
Compare
APS-C / DX 810gr AF Amazon B&H Photo
Tamron AF 28-80mm F3.5-5.6 Aspherical Lens Tamron AF 28-80mm F3.5-5.6 Aspherical
Compare
35mm FF 237gr AF Amazon B&H Photo
Tamron SP AF 70-200mm F2.8 Di LD IF MACRO Lens Tamron SP AF 70-200mm F2.8 Di LD IF MACRO
Compare
35mm FF 1330gr 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
Compare
APS-C / DX 225gr 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 Macro Alternatives in Pentax KAF Mount
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
Compare
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
Compare
35mm FF 510gr AF Amazon B&H Photo
Tamron AF 28-80mm F3.5-5.6 Aspherical Lens Tamron AF 28-80mm F3.5-5.6 Aspherical
Compare
35mm FF 237gr AF Amazon B&H Photo
Sigma 24-70mm F2.8 EX DG HSM Lens Sigma 24-70mm F2.8 EX DG HSM
Compare
35mm FF 790gr AF Amazon B&H Photo

Sigma 24-70mm F2.8 EX DG Detailed Specifications


General
Brand Sigma
Lens Type Zoom
Lens Type Standard Zoom
Lens Mount Pentax KAF
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 F32.0
Aperture Ring No
Diaphragm Blades 9
Optics
Optical Elements 14
Optical Groups 13
Special Elements 2 Special Low Dispersion (SLD) glass elements 3 aspherical elements

FOCUSING
Min Focus Distance 0.4m
Max Magnification 0.26X
Autofocus Yes
AF Motor Type Micromotor
Full Time Manual No
Focus Method Internal
Distance Scale Yes
DoF Scale Yes
PHYSICAL SPECS
Weight 715g
Diameter 89mm
Length 116mm
Weather Sealing No
Filter Thread 82mm
Filter Notes -
Hood Supplied Yes
Tripod Collar No
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Frequently Asked Questions about Sigma 24-70mm F2.8 EX DG Macro
is the Sigma 24-70mm F2.8 EX DG Macro a Weather Sealed lens?
What is the Minimum Focusing Distance of Sigma 24-70mm F2.8 EX DG Macro
is the Sigma 24-70mm F2.8 EX DG Macro an Autofocus (AF) lens?
What is the Filter Thread Size of Sigma 24-70mm F2.8 EX DG Macro
Does Sigma 24-70mm F2.8 EX DG Macro have Image Stabilization?
Does Sigma 24-70mm F2.8 EX DG Macro have Aperture Ring?
What is the Maximum Magnification Ratio of Sigma 24-70mm F2.8 EX DG Macro
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