Sigma 20mm F1.4 DG DN A is a Fixed aperture Auto Focus (AF)
Wideangle Prime lens with 35mm FF max sensor coverage, and it is designed to be used with
E Mount cameras.
What type of photography is the Sigma 20mm F1.4 DG DN A lens good for?
The type of photography that you are planning to use the Sigma 20mm F1.4 DG DN A is an important decision factor. Here we have evaluated its suitability to various photography scenarios:
Lenses in Sony E Mount with Same Focal and Aperture Range
Reasons to Buy Sigma 20mm F1.4 DG DN Art Lens
Here we've included a summary of the advantages and disadvantages of the Sigma 20mm F1.4 DG DN Art lens in a list form to help you determine whether it offers the features you need.
| Autofocus |
| Aperture Ring |
| Hood supplied |
| Full-time Manual Focusing |
| Very Fast Aperture |
| Covers Full-Frame Sensor |
| 11 Diaphragm Blades for Smooth Bokeh |
| Minimum focus distance of 0.23m / 9.1 inch |
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Lens Mount
Sigma 20mm F1.4 DG DN A is compatible with cameras that have a Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A9 III, Sony A7C Mark II and Sony A7CR.
Sigma 20mm F1.4 DG DN A is also available in Leica L mount.
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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 20mm F1.4 DG DN A has a maximum diameter of 88mm and total length of 111mm. It weighs 635g / 22.4 oz.
Below you can find a scaled side-by-side image of Sigma 20mm F1.4 DG DN A and Sony FE 20mm F1.8 G (Sony E mount) to get a better idea of how their sizes compare in real life. Check the detailed comparison of these two lenses here.
Comparison image of the Sigma 20mm F1.4 DG DN A and the Sony FE 20mm F1.8 G Size and Weight
Sigma 20mm F1.4 DG DN A has a filter thread of 82mm. Below are links to the filters that we recommend you to consider for your Sigma 20mm F1.4 DG DN A:
Focal Range
Sigma 20mm F1.4 DG DN A has a fixed focal length of 20mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 36mm.
Optical Image Stabilization
Sigma 20mm F1.4 DG DN A 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).
Maximum Magnification Ratio
Sigma 20mm F1.4 DG DN A has a Max Magnification Ratio of 0.16x and has a minimum focusing distance of 0.23m. 0.16x means that the max magnification ratio is very low and not suitable even for modest close-up shots.
Below are the 3 Wideangle Prime type Sony E mount lens alternatives with highest max magnification ratios:
Aperture
Sigma 20mm F1.4 DG DN A has a max aperture of F1.4 and a minimum aperture of F16.
Optical Formula
Sigma 20mm F1.4 DG DN A's optical formula consists of 17 elements in 15 groups . Following special elements are used in this design:
- 2 Super-Low Dispersion elements
- 3 aspherical elements
- Super Multi-Layer coating
- Water- and oil-resistant coating
Lens Hood
Sigma 20mm F1.4 DG DN A comes with a removable lens hood which is handy to reduce lens flare and glare in your photos. The model number of the hood is LH898-04.
Body Colour
Sigma 20mm F1.4 DG DN A is available in Black color.
Popular Comparisons of Sigma 20mm F1.4 DG DN A
Here are the eight most popular comparisons of the Sigma 20mm F1.4 DG DN A amongst Camera Decision readers.
Top Alternatives of Sigma 20mm F1.4 DG DN A Lens
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