Depth of field · APS-C

24 mm f/1.8 depth of field on APS-C

Exactly how much is sharp with a 24 mm lens at f/1.8 on an APS-C camera, from 30.0 cm to 100 m.

16.0 m
Hyperfocal distance
8.01 m
Sharp from (focused at hyperfocal)
37 mm f/2.8
Full-frame equivalent
61°
Diagonal angle of view

Depth of field by subject distance#

24 mm at f/1.8 on APS-C (23.5×15.6 mm), circle of confusion 20 µm. “Background blur” is the size of an out-of-focus light at infinity as a percentage of frame width.

Focus distanceNear limitFar limitTotal DoFFront / behindBackground blur
30.0 cm (0.98 ft)29.5 cm30.5 cm1.0 cm49% / 51%4.93%
50.0 cm (1.64 ft)48.6 cm51.5 cm3.0 cm49% / 51%2.86%
75.0 cm (2.46 ft)71.7 cm78.6 cm6.8 cm48% / 52%1.88%
1.00 m (3.28 ft)94.3 cm1.06 m12.2 cm47% / 53%1.40%
1.50 m (4.92 ft)1.37 m1.65 m27.9 cm45% / 55%0.92%
2.00 m (6.56 ft)1.78 m2.28 m50.2 cm44% / 56%0.69%
3.00 m (9.84 ft)2.53 m3.69 m1.16 m41% / 59%0.46%
4.00 m (13.1 ft)3.20 m5.32 m2.12 m38% / 62%0.34%
5.00 m (16.4 ft)3.81 m7.26 m3.44 m34% / 66%0.27%
7.00 m (23.0 ft)4.87 m12.4 m7.54 m28% / 72%0.20%
10.0 m (32.8 ft)6.16 m26.6 m20.4 m19% / 81%0.14%
15.0 m (49.2 ft)7.75 m234 m227 m3% / 97%0.09%
20.0 m (65.6 ft)8.89 m∞∞—0.07%
30.0 m (98.4 ft)10.4 m∞∞—0.05%
50.0 m (164 ft)12.1 m∞∞—0.03%
100 m (328 ft)13.8 m∞∞—0.01%

Try other settings#

Near limit—
Far limit—
Depth of field—
Hyperfocal distance—
In front / behind—

24 mm at other apertures (subject at 3 m)#

ApertureTotal DoFHyperfocal
f/1.275.6 cm24.0 m
f/1.488.7 cm20.6 m
f/1.81.16 m16.0 m
f/21.30 m14.4 m
f/2.81.89 m10.3 m
f/42.99 m7.22 m
f/5.65.22 m5.17 m
f/815.7 m3.62 m
f/11∞2.64 m
f/16∞1.82 m

Other focal lengths at f/1.8#

Focal lengthSubject atTotal DoF
14 mm3.00 m4.71 m
16 mm3.00 m3.06 m
20 mm3.00 m1.73 m
24 mm3.00 m1.16 m
28 mm3.00 m83.4 cm
35 mm3.00 m52.7 cm
40 mm3.00 m40.1 cm
50 mm3.00 m25.5 cm
85 mm3.00 m8.7 cm
105 mm3.00 m5.7 cm
135 mm3.00 m3.4 cm

Same lens settings on other formats#

24 mm f/1.8 on Full frame24 mm f/1.8 on Micro Four Thirds

When to use it#

At f/1.8, a 24 mm lens on APS-C is a natural choice for environmental portraits, street and low light. Focused at 3 m you get 1.16 m of sharp zone; for maximum front-to-back sharpness focus at 16.0 m and everything from 8.01 m to infinity will be acceptably sharp.

See also the f/1.8 aperture guide.

Frequently asked questions#

What is the depth of field of a 24mm lens at f/1.8?

On APS-C, focused at 3 m, it is 1.16 m; at 1 m it is 12.2 cm.

What is the hyperfocal distance for 24mm f/1.8?

16.0 m (52.6 ft) on APS-C. Everything from 8.01 m to infinity is acceptably sharp.

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