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Sigma 40mm F1.4 DG HSM A Leica L Review

Sigma 40mm F1.4 DG HSM A

Main Features

  • 40mm Focal Range
  • F1.4 Max Aperture
  • Weather Sealed
  • Filter Thread: 82mm
  • Max Format: 35mm FF
  • Leica L Mount
  • Weight: 0g.
  • Diameter: 88mm
  • Length: 131mm
  • Min Focus Distance:0.4m
  • Max Magnification:0.15x
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Sigma 40mm F1.4 DG HSM A Overview

Sigma 40mm F1.4 DG HSM A is an Auto Focus (AF) Standard Prime lens with 35mm FF max sensor coverage and it is designed to be used with Leica L mount cameras.

Lens Mount

Sigma 40mm F1.4 DG HSM A is compatible with cameras that have Leica L lens mount. Some of the latest released cameras that are compatible with the Leica L lenses are Sigma fp L, Leica SL2-S and Panasonic S5.

Sigma 40mm F1.4 DG HSM A is also available in Canon EF , Nikon F (FX), Sigma SA and Sony E mounts.

Focal Range

Sigma 40mm F1.4 DG HSM A has a fixed focal lenght of 40mm.


Weather Sealings

Sigma 40mm F1.4 DG HSM A is a weather sealed lens which provides an extra protection to prevent water and dust get inside the lens and camera body under light rain, snow and wind. In order to have an effective protection, you have to pair the Sigma 40mm F1.4 DG HSM A with a weather sealed camera body such as Sigma fp L, Leica SL2-S and Panasonic S5.

Maximum Magnification Ratio

Sigma 40mm F1.4 DG HSM A has a Max Magnification Ratio of 0.15x and has a minimum focusing distance of 0.4m. 0.15x means that the max magnification ratio is very low and not suitable even for modest close-up shots.

Aperture

Sigma 40mm F1.4 DG HSM A has a max aperture of F1.4 and a minimum aperture of F16.

Optical Formula

Sigma 40mm F1.4 DG HSM A's optical formula consists of 16 elements in 12 groups . Following special elements are used in this design:

  • 3 FLD
  • 3 SLD elements

Lens Hood

Sigma 40mm F1.4 DG HSM A comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.

Popular Comparisons of Sigma 40mm F1.4 DG HSM A

Here is the eight most popular comparisons of Sigma 40mm F1.4 DG HSM A amongst Camera Decision readers.

Top Alternatives of Sigma 40mm F1.4 DG HSM A Lens
Model Coverage Weight Focusing Street Price
Sigma 50mm F1.4 DG HSM A Lens Sigma 50mm F1.4 DG HSM A
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35mm FF 815gr AF Amazon B&H Photo
Sigma 35mm F1.2 DG DN Art Lens Sigma 35mm F1.2 DG DN Art
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35mm FF 1090gr AF Amazon B&H Photo
Panasonic Lumix S Pro 50mm F1.4 Lens Panasonic Lumix S Pro 50mm F1.4
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35mm FF 955gr AF Amazon B&H Photo
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35mm FF 645gr AF Amazon B&H Photo
Panasonic Lumix S 35mm F1.8 Lens Panasonic Lumix S 35mm F1.8
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35mm FF 295gr AF Amazon B&H Photo
Sigma 45mm F2.8 DG DN Contemporary Lens Sigma 45mm F2.8 DG DN Contemporary
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35mm FF 215gr AF Amazon B&H Photo
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35mm FF 1065gr AF Amazon B&H Photo
Sigma 35mm F2 DG DN Lens Sigma 35mm F2 DG DN
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35mm FF 325gr AF Amazon B&H Photo

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**This post contains affiliate links and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.

Pros and Cons of Sigma 40mm F1.4 DG HSM A


PROs
Weather Sealed
Built-in Autofocus
Hood supplied
Full-time Manual Focusing
Very Fast Aperture
Covers Full-Frame Sensor

CONs
Pricey
Sigma 40mm F1.4 DG HSM A Alternatives in Leica L Mount
Model Coverage Weight Focusing Street Price
Leica APO-Summicron-SL 35mm F2 ASPH Lens Leica APO-Summicron-SL 35mm F2 ASPH
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35mm FF 720gr AF Amazon B&H Photo
Panasonic Lumix S 35mm F1.8 Lens Panasonic Lumix S 35mm F1.8
Compare
35mm FF 295gr AF Amazon B&H Photo
Sigma 35mm F1.4 DG HSM Lens Sigma 35mm F1.4 DG HSM
Compare
35mm FF 665gr AF Amazon B&H Photo
Sigma 35mm F1.2 DG DN Art Lens Sigma 35mm F1.2 DG DN Art
Compare
35mm FF 1090gr AF Amazon B&H Photo
Sigma 45mm F2.8 DG DN Contemporary Lens Sigma 45mm F2.8 DG DN Contemporary
Compare
35mm FF 215gr AF Amazon B&H Photo
Sigma 35mm F2 DG DN Lens Sigma 35mm F2 DG DN
Compare
35mm FF 325gr AF Amazon B&H Photo
Sigma 35mm F1.4 DG DN Art Lens Sigma 35mm F1.4 DG DN Art
Compare
35mm FF 645gr AF Amazon B&H Photo

Sigma 40mm F1.4 DG HSM A Detailed Specifications


General
Brand Sigma
Lens Type Prime
Lens Type Standard Prime
Lens Mount Leica L
Max Format 35mm FF
Focal Range 40mm
Image Stabilization
Colour Unknown
Zoom Method No Zoom
Power Zoom No Zoom
Zoom Lock No Zoom
Zoom Ratio 1.0X
APERTURE
Max Aperture F1.4
Min Aperture F16
Aperture Ring No
Diaphragm Blades 9
Optics
Optical Elements 16
Optical Groups 12
Special Elements 3 FLD + 3 SLD elements

FOCUSING
Min Focus Distance 0.4m
Max Magnification 0.15X
Autofocus Yes
AF Motor Type Ring-type ultrasonic
Full Time Manual Yes
Focus Method Internal
Distance Scale Yes
DoF Scale No
PHYSICAL SPECS
Weight 0g
Diameter 88mm
Length 131mm
Weather Sealing Yes
Filter Thread 82mm
Filter Notes -
Hood Supplied Yes
Tripod Collar No
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Frequently Asked Questions about Sigma 40mm F1.4 DG HSM A
is the Sigma 40mm F1.4 DG HSM A a Weather Sealed lens?
What is the Minimum Focusing Distance of Sigma 40mm F1.4 DG HSM A
is the Sigma 40mm F1.4 DG HSM A an Autofocus (AF) lens?
What is the Filter Thread Size of Sigma 40mm F1.4 DG HSM A
Does Sigma 40mm F1.4 DG HSM A have Image Stabilization?
Does Sigma 40mm F1.4 DG HSM A have Aperture Ring?
What is the Maximum Magnification Ratio of Sigma 40mm F1.4 DG HSM A
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