Standard prime · APS-C

Canon EF-S 24mm f/2.8 STM

The Canon EF-S 24mm f/2.8 STM is a APS-C prime lens (24 mm, f/2.8) for Canon EF-S. It belongs to the standard prime class — ideal for street, documentary, everyday and low-light shooting.

24 mmf/2.8Canon EF-S
24 mm
Focal length
f/2.8
Maximum aperture
61°
Diagonal angle of view (APS-C)
APS-C
Designed for

Specifications#

Brand
Canon
Model
EF-S 24mm f/2.8 STM
Lens type
Standard prime
Focal length
24 mm
Maximum aperture
f/2.8
Image circle
APS-C (23.5×15.6 mm)
Mount(s)
Canon EF-S
Projection
Rectilinear
Autofocus motor
stepping motor (STM)
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 formatAt 24 mmEquiv. aperture (DoF)
APS-C36 mm · 61°f/4.2
APS-C (Canon)38 mm · 58°f/4.5
Micro Four Thirds48 mm · 49°f/5.6

Depth of field & background blur#

Computed on its native APS-C format (CoC 20 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: 24 mm f/2.8 on aps-c.

FocalApertureat 1 mat 2 mat 5 mat 10 mHyperfocalBlur @2 m
24 mmf/2.818.7 cm77.9 cm6.09 m189 m10.5 m0.4%
24 mmf/427.0 cm1.16 m12.4 m∞7.39 m0.3%
24 mmf/857.0 cm3.02 m∞∞3.71 m0.2%

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).

BodyMin. handheld shutter (longest focal)500 rule at 24 mmNPF at 24 mm, f/2.8
APS-C1/40 s14 s9 s
APS-C (Canon)1/40 s13 s9 s
Micro Four Thirds1/50 s10 s8 s

Adapt it to other systems#

Frequently asked questions#

Is the Canon EF-S 24mm f/2.8 STM full frame?

No — it is designed for APS-C sensors. On a full-frame body it vignettes or triggers crop mode.

What is the Canon EF-S 24mm f/2.8 STM equivalent to on APS-C?

Its focal length is already the real value for APS-C: 24 mm frames like 37 mm on full frame.

What is the Canon EF-S 24mm f/2.8 STM good for?

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

Sources & licences#

Last updated October 03, 2026 · How we calculate · Sources