Sigma 12-24mm F4.5-5.6 EX DG HSM is a Variable aperture Auto Focus (AF)
Ultra-Wideangle Zoom lens with 35mm FF max sensor coverage, and it is designed to be used with
KAF Mount cameras.
What type of photography is the Sigma 12-24mm F4.5-5.6 EX DG HSM lens good for?
The type of photography that you are planning to use the Sigma 12-24mm F4.5-5.6 EX DG HSM is an important decision factor. Here we have evaluated its suitability to various photography scenarios:
Reasons to Buy Sigma 12-24mm F4.5-5.6 EX DG Aspherical HSM Lens
Here we've included a summary of the advantages and disadvantages of the Sigma 12-24mm F4.5-5.6 EX DG Aspherical HSM 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 |
| Full-time Manual Focusing |
| Internal Focusing |
| Covers Full-Frame Sensor |
| Extreme Wide-angle capability |
| Minimum focus distance of 0.28m / 11.0 inch |
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| No Weather Sealing |
| Slow Aperture at Wide end |
| Slow Aperture at Tele end |
| Variable Aperture |
Lens Mount
Sigma 12-24mm F4.5-5.6 EX DG HSM is compatible with cameras that have a Pentax KAF lens mount. Some of the latest released cameras that are compatible with the Pentax KAF lenses are Pentax K-3 III Monochrome, Pentax KF and Pentax K-3 III.
Sigma 12-24mm F4.5-5.6 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 12-24mm F4.5-5.6 EX DG HSM has a maximum diameter of 87mm and total length of 103mm. It weighs 600g / 21.2 oz.
Focal Range
Sigma 12-24mm F4.5-5.6 EX DG HSM has a focal range of 12-24mm and 2.0X zoom ratio. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 18 - 36mm.
Optical Image Stabilization
Sigma 12-24mm F4.5-5.6 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 12-24mm F4.5-5.6 EX DG 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 compared 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 12-24mm F4.5-5.6 EX DG HSM has a Max Magnification Ratio of 0.14x and has a minimum focusing distance of 0.28m. 0.14x means that the max magnification ratio is very low and not suitable even for modest close-up shots.
Below are the 3 Ultra-Wideangle Zoom type Pentax KAF mount lens alternatives with highest max magnification ratios:
Aperture
Sigma 12-24mm F4.5-5.6 EX DG HSM is a variable aperture lens with a max aperture of f4.5 and a minimum aperture of f22 at 12mm, and a max aperture of f5.6 and minimum aperture of f22 at 24mm .
| Focal Length |
Max Aperture |
Min Aperture |
|
12mm
|
F4.5 |
F22 |
|
24mm
|
F5.6 |
F22 |
Optical Formula
Sigma 12-24mm F4.5-5.6 EX DG HSM's optical formula consists of 16 elements in 12 groups . Following special elements are used in this design:
- Four SLD glass elements
- Three aspherical elements
Lens Hood
Sigma 12-24mm F4.5-5.6 EX DG HSM comes with a built-in lens hood which is handy to reduce lens flare and glare in your photos.
Popular Comparisons of Sigma 12-24mm F4.5-5.6 EX DG HSM
Here are the eight most popular comparisons of the Sigma 12-24mm F4.5-5.6 EX DG HSM amongst Camera Decision readers.
Top Alternatives of Sigma 12-24mm F4.5-5.6 EX DG HSM Lens
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