Sigma 10-20mm F4-5.6 EX DC HSM is a Variable aperture Auto Focus (AF)
Ultra-Wideangle Zoom lens with APS-C / DX max sensor coverage, and it is designed to be used with
A Mount cameras.
What type of photography is the Sigma 10-20mm F4-5.6 EX DC HSM lens good for?
The type of photography that you are planning to use the Sigma 10-20mm F4-5.6 EX DC HSM is an important decision factor. Here we have evaluated its suitability to various photography scenarios:
Reasons to Buy Sigma 10-20mm F4-5.6 EX DC HSM Lens
Here we've included a summary of the advantages and disadvantages of the Sigma 10-20mm F4-5.6 EX DC 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 |
| Extreme Wide-angle capability |
| Minimum focus distance of 0.24m / 9.4 inch |
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| Lens Extends while zooming |
| Slow Aperture at Tele end |
| Variable Aperture |
Lens Mount
Sigma 10-20mm F4-5.6 EX DC HSM is compatible with cameras that have a Sony Alpha lens mount. Some of the latest released cameras that are compatible with the Sony Alpha lenses are Sony A68, Sony A77 II and Sony A58.
Sigma 10-20mm F4-5.6 EX DC HSM is also available in Canon EF , Four Thirds, Pentax KAF, Sigma SA and Nikon F (DX) mounts.
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Size, Weight and Filter Thread
Size and weight is a very important decision factor when searching for your next lens. Sigma 10-20mm F4-5.6 EX DC HSM has a maximum diameter of 84mm and total length of 81mm when not extended. It weighs 470g / 16.6 oz.
Sigma 10-20mm F4-5.6 EX DC HSM has a filter thread of 77mm. Below are links to the filters that we recommend you to consider for your Sigma 10-20mm F4-5.6 EX DC HSM:
Focal Range
Sigma 10-20mm F4-5.6 EX DC HSM has a focal range of 10-20mm and 2.0X zoom ratio which has a 35mm equivalent focal range of 15-30mm when used on a APS-C / DX format camera.
Optical Image Stabilization
Sigma 10-20mm F4-5.6 EX DC 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 10-20mm F4-5.6 EX DC 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 10-20mm F4-5.6 EX DC HSM has a Max Magnification Ratio of 0.15x and has a minimum focusing distance of 0.24m. 0.15x 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 Sony Alpha mount lens alternatives with highest max magnification ratios:
Aperture
Sigma 10-20mm F4-5.6 EX DC HSM is a variable aperture lens with a max aperture of f4 and a minimum aperture of f22 at 10mm, and a max aperture of f5.6 and minimum aperture of f32 at 20mm .
| Focal Length |
Max Aperture |
Min Aperture |
|
10mm
|
F4 |
F22 |
|
20mm
|
F5.6 |
F32 |
Optical Formula
Sigma 10-20mm F4-5.6 EX DC HSM's optical formula consists of 14 elements in 10 groups . Following special elements are used in this design:
- 3 SLD glass elements
- 2 hybrid aspherical elements
- 1 glass mold aspherical
Lens Hood
Sigma 10-20mm F4-5.6 EX DC HSM comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.
Body Colour
Sigma 10-20mm F4-5.6 EX DC HSM is available in Black color.
Popular Comparisons of Sigma 10-20mm F4-5.6 EX DC HSM
Here are the eight most popular comparisons of the Sigma 10-20mm F4-5.6 EX DC HSM amongst Camera Decision readers.
Top Alternatives of Sigma 10-20mm F4-5.6 EX DC HSM Lens
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