Sigma 20mm F1.4 DG HSM A is a Fixed aperture Auto Focus (AF)
Ultra-Wideangle Prime lens with 35mm FF max sensor coverage, and it is designed to be used with
SA Mount cameras.
What type of photography is the Sigma 20mm F1.4 DG HSM A lens good for?
The type of photography that you are planning to use the Sigma 20mm F1.4 DG HSM A is an important decision factor. Here we have evaluated its suitability to various photography scenarios:
Reasons to Buy Sigma 20mm F1.4 DG HSM A Lens
Here we've included a summary of the advantages and disadvantages of the Sigma 20mm F1.4 DG HSM A lens in a list form to help you determine whether it offers the features you need.
| Autofocus |
| Distance Scale |
| Hood supplied |
| Full-time Manual Focusing |
| Very Fast Aperture |
| Covers Full-Frame Sensor |
| 9 Diaphragm Blades for Smooth Bokeh |
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Lens Mount
Sigma 20mm F1.4 DG HSM A is compatible with cameras that have a Sigma SA lens mount. Some of the latest released cameras that are compatible with the Sigma SA lenses are Sigma Quattro, Sigma Quattro H and Sigma SD1 Merrill.
Sigma 20mm F1.4 DG HSM A is also available in Canon EF , Nikon F (FX) and Leica L 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 20mm F1.4 DG HSM A has a maximum diameter of 91mm and total length of 130mm. It weighs 950g / 33.5 oz.
Below you can find a scaled side-by-side image of Sigma 20mm F1.4 DG HSM A and Sigma 14mm F1.8 DG HSM (Sigma SA 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 HSM A and the Sigma 14mm F1.8 DG HSM Size and Weight
Focal Range
Sigma 20mm F1.4 DG HSM A has a fixed focal length of 20mm.
Optical Image Stabilization
Sigma 20mm F1.4 DG HSM 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 HSM A has a Max Magnification Ratio of 0.14x and has a minimum focusing distance of 0.3m. 0.14x means that the max magnification ratio is very low and not suitable even for modest close-up shots.
Below are the 2 Ultra-Wideangle Prime type Sigma SA mount lens alternatives with highest max magnification ratios:
Aperture
Sigma 20mm F1.4 DG HSM A has a max aperture of F1.4.
Optical Formula
Sigma 20mm F1.4 DG HSM A's optical formula consists of 15 elements in 11 groups . Following special elements are used in this design:
- Two FLD
- five SLD elements
- Super Multi-Layer coating
Lens Hood
Sigma 20mm F1.4 DG HSM A comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.
Body Colour
Sigma 20mm F1.4 DG HSM A is available in Black color.
Popular Comparisons of Sigma 20mm F1.4 DG HSM A
Here are the eight most popular comparisons of the Sigma 20mm F1.4 DG HSM A amongst Camera Decision readers.
Top Alternatives of Sigma 20mm F1.4 DG HSM A Lens
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