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Sigma 20mm f/1.4 DG HSM Art Lens – Canon EF Mount


  • Lens construction: 15 elements in 11 groups
  • Minimum aperture: F16
  • Angle of view (35mm equivalent): 94.5°
  • Minimum focusing distance: 27.6 cm / 10.9 in.
  • Maximum magnification ratio: 1:7.1

 

$1,506.00

Sigma 20mm f/1.4 DG HSM Art Lens – Canon EF Mount

With a focal length of 20mm and F1.4 aperture, this lens delivers outstanding large-aperture brightness and bokeh, delivering unprecedented visual experiences. Allowing the photographer to leverage the perspective provided by the wide -angle and the shallow depth of field provided by the large aperture, this lens is ideal not only for such ultra-wide-angle subjects as landscapes and starry skies, but also for snapshots in low light, indoor photography, portraits with a natural bokeh effect, and much more.

Minimized chromatic aberrations

This lens minimizes chromatic aberrations, a common issue in large-aperture ultra-wide-angle lenses. It features two FLD (“F” Low Dispersion)* glass and five SLD (Special Low Dispersion) glass elements to minimize transverse chromatic aberration, which is mainly visible around the edge of the image. The optimized lens power distribution helps minimize axial chromatic aberration. As a result, this lens delivers high image quality in every situation without color smearing, and its rendering performance is consistently sharp with high contrast.

* FLD glass is ultra-low-dispersion glass that offers performance of the highest level. Highly transparent, its refractive index and dispersion are extremely low as compared to conventional types of glass. It offers characteristics very similar to those of fluorite, which is valued for its high anomalous dispersion. These characteristics minimize residual chromatic aberration (secondary spectrum), which cannot be corrected by ordinary optical glass, while helping to produce sharp, high-contrast images.

Minimized distortion

Distortion is a common issue in wide-angle lenses, and it is not possible to correct it simply by changing the aperture value. For this reason, a lens must be designed from the start to minimize this issue. By adjusting the incidence angle of light starting with the first lens element and incorporating optimally positioned aspherical glass elements, the SIGMA 20mm F1.4 DG HSM | Art lens minimizes distortion throughout the entire image.

Exclusive low-dispersion glass

SIGMA lenses feature up to three types of exclusive low-dispersion glass offering superior performance: ELD (Extraordinary Low Dispersion), SLD (Special Low Dispersion) and FLD (“F” Low Dispersion).

 Find charts for this lens below:

Lens Construction

Diffraction MTF

Geometrical MTF

Distortion

Vignetting

Specifications:

Focal Length 20mm
Maximum Aperture f/1.4
Minimum Aperture f/16
Lens Mount Canon EF
Format Compatibility Full-Frame
Angle of View 94.5°
Maximum Magnification 0.141x
Minimum Focus Distance 10.9″ / 27.69 cm
Optical Design 15 Elements in 11 Groups
Diaphragm Blades 9, Rounded
Focus Type Autofocus
Image Stabilization None
Filter Size None
Dimensions (ø x L) 3.6 x 5.1″ / 90.7 x 129.8 mm
Weight 2.1 lb / 950 g

 

Click here for our range of Sigma Lenses

Focal Length 20mm
Maximum Aperture f/1.4
Minimum Aperture f/16
Lens Mount Canon EF
Format Compatibility Full-Frame
Angle of View 94.5°
Maximum Magnification 0.141x
Minimum Focus Distance 10.9″ / 27.69 cm
Optical Design 15 Elements in 11 Groups
Diaphragm Blades 9, Rounded
Focus Type Autofocus
Image Stabilization None
Filter Size None
Dimensions (ø x L) 3.6 x 5.1″ / 90.7 x 129.8 mm
Weight 2.1 lb / 950 g
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