This is a zoom lens manufactured by Sigma and the model was launched 2001.
The lens belongs to the category
normal zoom lenses, a normal lens where you have the possibility to zoom in and out.
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| See all lenses released by Sigma |
| See all lenses that was released 2001 |
| Read more about normal lenses |
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| Compability, auto focus and focal length |
| The lens is available for both Canon and Nikon cameras, but there are two different versions of this lens (one for each brand and mount) so it is important that you ask for and choose the right version when bying the lens. |
| This lens is constructed to fit all models of Canon and Nikon cameras, regardless of camera model or type of sensor. |
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Here it is the only Canon version of the lens that has a built-in auto focus (AF) motor. The possibility to use auto focus (AF) is available for Nikon cameras but only if the camera itself has a built-in auto focus (AF) motor. Some cheaper and budget camera models from Nikon lacks a built-in auto focus motor, and we at Lensora appreciate auto focus, so in the list of compatible cameras we have chosen to display only the cameras that you can get autofocus with.
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| The lens has a focal length of 20-40 mm.
Depending on which camera the lens is used, the experienced and perceived focal length will be different. Please visit the list of compatible cameras below, it will provide the equivalent focal length you get on each camera.
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| See compatible cameras and perceived/equivalent focal length |
| Read more about focal length and your field of view |
| Read more on the cameras impact on the perceived focal length |
| Read more about the auto focus motor and the importance of this part |
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| Lens brightness and image stabilizer |
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The lens brightness and aperture value is f/2,8.
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This aperture value indicates that the lens is very bright.
This will make it so much easier shooting in darker environments where you do not want or can use flash lighting, for example in churches or at different sports venues.
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| A feature worth commenting, which is also related to lens brightness, is that the brightness and maximum aperture-value remains constant regardless of focal length used. This makes it easier for you as a photographer. No matter if you are have the focus ring and focal length at 20 mm or at 40 mm the aperture value can be f/2,8. |
| The lens lacks image stabilization, which otherwise os good for avoiding the blur that can occur when using slow shutter speeds. Since the lens is bright, with good aperture value, the lack of image stabilization might not be that big of a deal, although a image stabilizer is always an advantage to have.
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| Read more about the aperture and lens brightness |
| Read more about how an image stabilizer works |
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| Filter and Lens Hood |
| The lens has a traditional filter thread on the front and its measuring 82 mm which also the filter you will use must have. If you use for example an UV filter can be a cheap insurance against scratches and dust.
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Together with the lens there is a lens hood included but we have unfortunately no further information on model etc so feel free to contact us if you know more.
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| Read more about filters |
| Read more about lens hoods |
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| Pictures (product and sample images) |
| In order to see larger product images of the lens, click the link below. |
| Besides looking at product images it is also of interest to see pictures taken with this specific lens. This can give you a hint of what kind of images this lens can achieve, what the focal length will be like etc. |
| Images of Sigma EX 20-40mm f/2,8 DG |
| Sample pictures taken with Sigma EX 20-40mm f/2,8 DG |
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| Things to consider before buying |
| Below you will find some summarized points and facts that can be considered as the 'pros and cons' of this lens. These are based entirely on the facts and values that are accessible through the lens specification, so we highly recommend that you also read the reported reviews available (see tab 'Reviews'); this in order to get a more complete view of the lens and its capabilites. Reviewer opinions reflect the lens, its use and its optical performance in a more accurate way, but any way - here a few different points to consider before buying this lens. |
 | The price (more info) |
| The lens brightness, f/2,8 |
| Constant maximum aperture value regardless of focal length |
| Works on all sensor types |
| A lens hood is included |
 | No built-in auto focus motor (the Nikon version) |
| The lens is not sealed against moisture and dust |
| Heavy (595 gr) |
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