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/Wildlife | Fair |
| Sports | Average |
| Portrait | Very Good |
| Travel | Very Good |
| Street | Very Good |
| Wedding | Very Good |
| Walk Around | Very Good |
| Vlogging | Very Good |
| Landscape | Very Good |
| Macro | Average |
Lenses in Pentax KAF Mount with Same Focal and Aperture Range
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.
| 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 |
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| 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.