Sigma 105 mm F1.4 DG HSM Art Specs, Equivalents & Depth of Field

105 mm

Focal length

f/1.4

Maximum aperture

23°

Diagonal angle of view (Full frame)

Full frame

Designed for

Specifications#

Brand: Sigma
Model: 105 mm F1.4 DG HSM Art
Lens type: Portrait / short tele prime
Focal length: 105 mm
Maximum aperture: f/1.4
Image circle: Full frame (36×24 mm)
Mount(s): Sony E-mount, Canon EF, L-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 105 mm	Equiv. aperture (DoF)
Full frame	105 mm · 23°	f/1.4
APS-C	158 mm · 15°	f/2.1
APS-C (Canon)	168 mm · 15°	f/2.2
Micro Four Thirds	210 mm · 12°	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: 105 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
105 mm	f/1.4	0.7 cm	2.9 cm	18.7 cm	75.5 cm	263 m	11.5%
105 mm	f/4	1.9 cm	8.3 cm	53.4 cm	2.18 m	92.0 m	4.0%
105 mm	f/8	3.9 cm	16.5 cm	1.08 m	4.52 m	46.0 m	2.0%

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 105 mm	NPF at 105 mm, f/1.4
Full frame	1/100 s	5 s	2 s
APS-C	1/160 s	3 s	2 s
APS-C (Canon)	1/160 s	3 s	2 s
Micro Four Thirds	1/200 s	2 s	1 s

Compatible cameras#

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

Adapt it to other systems#

Nikon Z Nikon 1 (CX)Pentax Q 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

Similar lenses#

Nikon Nikkor AF-S 105mm f/1.4E ED f/1.4
Nikon Nikkor AI-S 105mm f/2.5 f/2.5
Sigma 90mm F2.8 DG DN | Contemporary 021 f/2.8
Canon TS-E 90mm f/2.8 f/2.8
Sony FE 85mm f/1.4 GM f/1.4
Sony FE 85mm f/1.8 f/1.8
Panasonic S 85mm f/1.8 f/1.8
Samyang 85mm f/1.4 IF UMC Aspherical f/1.4
Samyang AF 85mm f/1.4 f/1.4
Sigma 85mm F1.4 DG DN | Art 020 f/1.4
Zeiss Batis 85mm f/1.8 f/1.8
Zeiss Sonnar 85mm f/2.8 AEJ f/2.8

Frequently asked questions#

Is the Sigma 105 mm F1.4 DG HSM Art full frame?

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

What is the Sigma 105 mm F1.4 DG HSM Art equivalent to on APS-C?

On a 1.5× APS-C body it frames like 158 mm, and like 168 mm on Canon APS-C.

What is the Sigma 105 mm F1.4 DG HSM Art good for?

As a portrait / short tele prime it suits head-and-shoulders portraits with flattering perspective and creamy backgrounds.

Sources & licences#

Lensfun lens database — CC BY-SA 3.0