Specifications#
- Brand
- Sony
- Model
- FE 20-70mm f/4 G
- Lens type
- Standard zoom
- Focal length
- 20–70 mm
- Maximum aperture
- f/4
- Image circle
- Full frame (36×24 mm)
- Mount(s)
- Sony E-mount
- Projection
- Rectilinear
- Introduced
- 2023
- 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 20 mm | At 37 mm | At 70 mm | Equiv. aperture (DoF) |
|---|---|---|---|---|
| Full frame | 20 mm · 94° | 37 mm · 61° | 70 mm · 34° | f/4.0 |
| APS-C | 30 mm · 70° | 56 mm · 42° | 105 mm · 23° | f/6.0 |
| APS-C (Canon) | 32 mm · 68° | 59 mm · 40° | 112 mm · 22° | f/6.4 |
| Micro Four Thirds | 40 mm · 57° | 74 mm · 33° | 140 mm · 18° | f/8.0 |
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: 20 mm f/4 on full frame.
| Focal | Aperture | at 1 m | at 2 m | at 5 m | at 10 m | Hyperfocal | Blur @2 m |
|---|---|---|---|---|---|---|---|
| 20 mm | f/4 | 64.4 cm | 3.67 m | ∞ | ∞ | 3.35 m | 0.1% |
| 20 mm | f/8 | 1.80 m | ∞ | ∞ | ∞ | 1.69 m | 0.1% |
| 37 mm | f/4 | 17.0 cm | 70.9 cm | 5.37 m | 73.6 m | 11.4 m | 0.5% |
| 37 mm | f/8 | 34.8 cm | 1.56 m | 35.8 m | ∞ | 5.74 m | 0.2% |
| 70 mm | f/4 | 4.6 cm | 18.9 cm | 1.23 m | 5.17 m | 40.9 m | 1.8% |
| 70 mm | f/8 | 9.1 cm | 38.2 cm | 2.56 m | 12.7 m | 20.5 m | 0.9% |
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 20 mm | NPF at 20 mm, f/4 |
|---|---|---|---|
| Full frame | 1/80 s | 25 s | 16 s |
| APS-C | 1/100 s | 17 s | 13 s |
| APS-C (Canon) | 1/125 s | 16 s | 13 s |
| Micro Four Thirds | 1/125 s | 12 s | 12 s |
Compatible cameras#
Bodies in our database with a native Sony E-mount mount.
- Sony α7R VI 2026
- Sony α7 V 2025
- Sony ZV-E10 II 2024
- Sony α1 II 2024
- Sony α9 III 2024
- Sony α6700 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
- Sony α7S III 2020
- Sony FX6 2020
- Sony α7R IV 2019
- Sony α6400 2019
- Sony α6600 2019
- Sony α6100 2019
- Sony α7 III 2018
- Sony α6300 2016
- Sony α6500 2016
- Sony α7R II 2015
- Sony α7S II 2015
- Sony α5000 2014
- Sony α5100 2014
- Sony α6000 2014
- Sony NEX-3N 2013
- Sony NEX-5T 2013
- Sony α3000 2013
- Sony α7 2013
- Sony NEX-F3 2012
- Sony NEX-7 2011
- Sony NEX-C3 2011
- Sony Alpha NEX-5N 2011
- Sony NEX-5 2010
- Sony Alpha NEX-3 2010
- Sony α7R III
Adapt it to other systems#
Similar lenses#
- Sigma 18-50mm F2.8 DC DN | Contemporary 021 f/2.8
- Sony E 18-55mm f/3.5-5.6 OSS f/3.5–5.6
- Sony E PZ 18-105mm f/4 G OSS f/4
- Tamron 17-70mm F/2.8 Di III-A VC RXD f/2.8
- Tamron E 17-28mm F2.8-2.8 f/2.8
- Sony FE 24-105mm f/4 G OSS f/4
- Sigma 24-70mm F2.8 DG DN II | Art 024 f/2.8
- Sigma 24-70mm F2.8 DG DN | Art 019 f/2.8
- Sony FE 24-70mm f/2.8 GM f/2.8
- Sony FE 24-70mm f/2.8 GM II f/2.8
- Sony FE 24-70mm f/4 ZA OSS f/4
- Sony E 16-50mm f/3.5-5.6 OSS PZ (Vers. I/II) f/3.5–5.6
Frequently asked questions#
Is the Sony FE 20-70mm f/4 G full frame?
Yes — it covers the full 36 × 24 mm frame.
What is the Sony FE 20-70mm f/4 G equivalent to on APS-C?
On a 1.5× APS-C body it frames like 30–105 mm, and like 32–112 mm on Canon APS-C.
What is the Sony FE 20-70mm f/4 G good for?
As a standard zoom it suits everyday shooting, travel, events and walkaround use.
Sources & licences#
- Lensfun lens database — CC BY-SA 3.0
Last updated October 03, 2026 · How we calculate · Sources