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

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 an Auto Focus (AF) Standard Zoom lens with 35mm FF max sensor coverage. When mounted on a 35mm FF sensor camera, it will give you an FF equivalent focal range of 24 - 70mm. With a max aperture of f2.8, this lens is fast on wide end and equally fast at 70mm with a max aperture of f2.8.
Sigma 24-70mm F2.8 EX DG is not a weather sealed lens, so you have to be extra careful against rain and dust.

Pros and Cons of Sigma 24-70mm F2.8 EX DG Macro

PROs
Built-in Autofocus
Hood supplied
Fast and Bright at Wide end
Fast and Bright at Tele end
Constant f2.8 Aperture throughout the range
Covers Full-Frame Sensor

CONs
No Weather Sealing
Lens Extents while focusing
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
Sigma 24-70mm F2.8 EX DG Macro Alternatives in Pentax KAF Mount
Model Focal Length Max Aperture Weight Focusing
HD Pentax D FA 24-70mm F2.8 ED SDM WR 24-70mm F2.8 787gr AF
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Tamron AF 28-75mm F2.8 XR Di LD Aspherical IF 28-75mm F2.8 510gr AF
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Tamron AF 28-80mm F3.5-5.6 Aspherical 28-80mm F3.5 - F5.6 237gr AF
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Sigma 24-70mm F2.8 EX DG HSM 24-70mm F2.8 790gr AF
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Other 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
What is the Maximum Magnification Ratio of Sigma 24-70mm F2.8 EX DG Macro
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