Sigma 40mm F1.4 DG HSM | Art Specs, Equivalents & Depth of Field

40 mm

Focal length

f/1.4

Maximum aperture

57°

Diagonal angle of view (Full frame)

Full frame

Designed for

Specifications#

Brand: Sigma
Model: 40mm F1.4 DG HSM | Art
Lens type: Standard prime
Focal length: 40 mm
Maximum aperture: f/1.4
Image circle: Full frame (36×24 mm)
Mount(s): Canon EF, L-Mount, Sony E-mount, Nikon F, Sigma SA
Projection: Rectilinear
Autofocus motor: hypersonic (HSM)
Lensfun correction profile: Yes — distortion/vignetting/TCA

Equivalent focal length on different cameras#

Field of view and depth-of-field equivalence when this lens is used on bodies with different sensor sizes (natively or via an adapter).

Camera format	At 40 mm	Equiv. aperture (DoF)
Full frame	40 mm · 57°	f/1.4
APS-C	60 mm · 39°	f/2.1
APS-C (Canon)	64 mm · 37°	f/2.2
Micro Four Thirds	80 mm · 30°	f/2.8

Depth of field & background blur#

Computed on its native Full frame format (CoC 30 µm). “Blur @2 m” is the size of an out-of-focus point at infinity, as a percentage of frame width, with the subject at 2 m — a simple bokeh index. Full table: 40 mm f/1.4 on full frame.

Focal	Aperture	at 1 m	at 2 m	at 5 m	at 10 m	Hyperfocal	Blur @2 m
40 mm	f/1.4	5.0 cm	20.6 cm	1.32 m	5.61 m	38.1 m	1.6%
40 mm	f/4	14.5 cm	60.1 cm	4.32 m	33.8 m	13.4 m	0.6%
40 mm	f/8	29.4 cm	1.29 m	16.7 m	∞	6.71 m	0.3%

Handheld & night-sky limits#

NPF assumes typical 20–24 MP sensors (≈6 µm pixels on full frame, ≈3.9 µm on APS-C, ≈3.3 µm on Micro Four Thirds).

Body	Min. handheld shutter (longest focal)	500 rule at 40 mm	NPF at 40 mm, f/1.4
Full frame	1/40 s	12 s	6 s
APS-C	1/60 s	8 s	4 s
APS-C (Canon)	1/60 s	8 s	4 s
Micro Four Thirds	1/80 s	6 s	4 s

Compatible cameras#

Bodies in our database with a native Canon EF, L-Mount, Sony E-mount, Nikon F and Sigma SA mount.

Adapt it to other systems#

Sony E-mount Canon RF Nikon Z Fujifilm X-mount Micro Four Thirds L-Mount Canon EF-M Fujifilm G-mount Hasselblad XCD Nikon 1 (CX)Pentax Q Samsung NX Nikon F Pentax K

Similar lenses#

Panasonic S 40mm f/2 f/2
Sony FE 40mm f/2.5 G f/2.5
Canon EF 40mm f/2.8 STM f/2.8
Voigtländer Ultron 40mm f/2 SL-II Aspherical f/2
Samyang AF 45mm f/1.8 f/1.8
Sigma 45mm F2.8 DG DN | Contemporary 019 f/2.8
Canon TS-E 45mm f/2.8 f/2.8
Nikon Nikkor AI 45mm f/2.8 GN f/2.8
Tamron SP 45mm F/1.8 Di VC USD f/1.8
Leica APO-Summicron-SL 1:2/35 Asph. f/2
Leica Summilux-TL 1:1.4/35 Asph. f/1.4
Panasonic S 35mm f/1.8 f/1.8

Frequently asked questions#

Is the Sigma 40mm F1.4 DG HSM | Art full frame?

Yes — it covers the full 36 × 24 mm frame.

What is the Sigma 40mm F1.4 DG HSM | Art equivalent to on APS-C?

On a 1.5× APS-C body it frames like 60 mm, and like 64 mm on Canon APS-C.

What is the Sigma 40mm F1.4 DG HSM | Art good for?

As a standard prime it suits street, documentary, everyday and low-light shooting.

Sources & licences#

Lensfun lens database — CC BY-SA 3.0