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Sigma AF 50 mm  f/ 1.4 EX DG HSM Lens

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Sigma AF 50 mm  f/ 1.4 EX DG HSM lens

Sigma AF 50 mm  f/ 1.4 EX DG HSM lens

Sigma AF 50 mm  f/ 1.4 EX DG HSM lens

Sigma AF 50 mm  f/ 1.4 EX DG HSM lens

Sigma AF 50 mm  f/ 1.4 EX DG HSM lens


Sigma AF 50 mm  f/ 1.4 EX DG HSM MTF Chart

Optical design

Sigma AF 50 mm  f/ 1.4 EX DG HSM optical design

Format: 35mm SLR

Type: Prime lens

Focusing: Auto Focus (AF)

Lens mounts: Canon EF, EF-S, Sony A / Minolta A, Nikon F (FX, DX), 4/3 (Four/Thirds), Pentax K, Sigma SA

First year of production: 2008

Optical design: 8 elements in 6 groups

Features: Ultra-Sonic Motor
User reviews (3)

Photos (6)

Tests (0)

Owners (16)

Views (10844)

Average price: $603


Focal lengthMax. apertureMin. apertureBladesMin. Focus (m.)Filter Ø (mm.)Weight (gr/oz)Length (mm/in)

Additional information:

The Sigma AF 50 mm  f/ 1.4 EX DG HSM  is a fast standard lens optimized for digital cameras, but which is able to work on film cameras as well. It belongs to the EX professional line.

On  APS-C cameras equivalent focal length is 75 mm, on 4/3 cameras -100 mm.

A maximum aperture ratio of 1.4 makes it possible to shoot with shallow depth of field and in poor lighting conditions.

A 9-blade  aperture produces good blurring of out-of-focus areas. Circles of confusion are almost round, especially at f/2.0.

The Sigma AF 50 mm f/1.4 EX DG HSM is rather sharp at f/1.4 already. It is very sharp from f/4 onwards.

A molded aspherical element introduced into the optical scheme improves sagittal aberration of coma and chromatic aberrations.

Hyper Sonic Motor (HSM) assures fast and silent focusing. The autofocus is rather "tenacious" even in poor light.

Vignetting is pronounced at f/1.4, but  from f/1.4 it is almost invisible.

Focusing is internal. The front lens does not rotate, which enables the use of polarized and gradient filters. It is possible to manually adjust sharpness at any time by turning the focusing ring.

Color  rendering is natural, colors are a bit more saturated than real-life. Contrast of images is high.

An improved multilayer coating of optical elements effectively combat flare and rereflections. However, it is recommended to use it with a hood in side and back lighting.

The Sigma AF 50 mm f/1.4 EX DG HSM is perfect as an all-purpose kit prime lens especially for 35 mm cameras. It is fit for the most types and genres of photography.

According to the results of the Product of the Year contest at  the Photoforum-2009 exhibition the Sigma AF 50 mm F/1.4 EX DG HSM was nominated and rewarded a prize for the best innovative product.

Compatible hood: LH829-01 310

A soft carrying case and a petal hood are completed with the lens.

Attention: Sony/Minolta variants are not equipped with an HSM, ordinary motor is used instead.

Links to online resources:
PDF Files:
Posted by: Sergei Borodin   Date of publication: 07.09.2010

Photos taken with this lens Sigma AF 50 mm  f/ 1.4 EX DG HSM:

Autor: yura_mnsk
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Autor: yura_mnsk
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Autor: yura_mnsk
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Autor: yura_mnsk
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Mechanical quality4.5618
Optical quality4.6818
Pricing / Value4.1218
Overall lens rating

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Owner reviews: Sigma AF 50 mm  f/ 1.4 EX DG HSM

Ferenc Boloni 02.03.2020 00:42:49
Period of use: 1 day


Great bulid good looking lens what promises a lot but hat a big weakness its usable quality just from f/2.8


50mm f/1.4 lens what is really usable qualtiy just at f/2.8 even on full frame or cropped sensors.


If this lens is just usable quality start from f/2.8 worth maybe half of real price.