Specifications#
- Brand
- Sigma
- Model
- 45mm F2.8 DG DN | Contemporary 019
- Lens type
- Standard prime
- Focal length
- 45 mm
- Maximum aperture
- f/2.8
- Image circle
- Full frame (36×24 mm)
- Mount(s)
- Sony E-mount, L-Mount
- Projection
- Rectilinear
- 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 45 mm | Equiv. aperture (DoF) |
|---|---|---|
| Full frame | 45 mm · 51° | f/2.8 |
| APS-C | 68 mm · 35° | f/4.2 |
| APS-C (Canon) | 72 mm · 33° | f/4.5 |
| Micro Four Thirds | 90 mm · 27° | f/5.6 |
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: 50 mm f/2.8 on full frame.
| Focal | Aperture | at 1 m | at 2 m | at 5 m | at 10 m | Hyperfocal | Blur @2 m |
|---|---|---|---|---|---|---|---|
| 45 mm | f/2.8 | 7.9 cm | 32.7 cm | 2.15 m | 9.96 m | 24.2 m | 1.0% |
| 45 mm | f/4 | 11.4 cm | 47.0 cm | 3.21 m | 18.1 m | 16.9 m | 0.7% |
| 45 mm | f/8 | 22.9 cm | 97.9 cm | 8.96 m | ∞ | 8.48 m | 0.4% |
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 45 mm | NPF at 45 mm, f/2.8 |
|---|---|---|---|
| Full frame | 1/50 s | 11 s | 6 s |
| APS-C | 1/60 s | 7 s | 5 s |
| APS-C (Canon) | 1/80 s | 7 s | 5 s |
| Micro Four Thirds | 1/100 s | 6 s | 4 s |
Compatible cameras#
Bodies in our database with a native Sony E-mount and L-Mount mount.
- Sony α7R VI 2026
- Panasonic Lumix DC-S1M2 2025
- Sony α7 V 2025
- Sigma BF 2025
- Panasonic Lumix S1IIE 2025
- Panasonic Lumix S1RII 2025
- Sony ZV-E10 II 2024
- Sony α1 II 2024
- Sony α9 III 2024
- Panasonic Lumix DC-S9 2024
- Leica SL3 2024
- Sony α6700 2023
- Panasonic Lumix DC-S5M2 2023
- Sony ZV-E1 2023
- Sony α7C II 2023
- Sony α7CR 2023
- Sony α7R V 2022
- Sony FX30 2022
- Sony FX3 2021
- Sony ZV-E10 2021
- Sony α1 2021
- Sony α7 IV 2021
- Sigma fp L 2021
- Sony α7S III 2020
- Panasonic Lumix DC-S5 2020
- Sony FX6 2020
- Sony α7R IV 2019
- Sigma fp 2019
- Sony α6400 2019
- Sony α6600 2019
- Leica SL2 2019
- Panasonic Lumix DC-S1 2019
- Sony α6100 2019
- Sony α7 III 2018
- Leica TL2 2017
- Sony α6300 2016
- Sony α6500 2016
- Leica TL 2016
- Sony α7R II 2015
- Sony α7S II 2015
Adapt it to other systems#
Similar lenses#
- Samyang AF 45mm f/1.8 f/1.8
- Sony FE 50mm f/1.2 GM f/1.2
- Leica APO-Summicron-SL 1:2/50 Asph. f/2
- Panasonic S 50mm f/1.8 f/1.8
- Panasonic S Pro 50mm f/1.4 f/1.4
- Pentax SMC Takumar 50mm f/1.4 f/1.4
- Samyang 50mm f/1.4 AS UMC f/1.4
- Sony FE 50mm f/1.4 GM f/1.4
- Sony FE 50mm f/1.8 f/1.8
- Sony FE 50mm f/2.5 G f/2.5
- Viltrox AF 50mm f/1.8 Z f/1.8
- Voigtländer APO-Lanthar 50mm F2 Aspherical f/2
Frequently asked questions#
Is the Sigma 45mm F2.8 DG DN | Contemporary 019 full frame?
Yes — it covers the full 36 × 24 mm frame.
What is the Sigma 45mm F2.8 DG DN | Contemporary 019 equivalent to on APS-C?
On a 1.5× APS-C body it frames like 68 mm, and like 72 mm on Canon APS-C.
What is the Sigma 45mm F2.8 DG DN | Contemporary 019 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
Last updated October 03, 2026 · How we calculate · Sources