9.83 m
Hyperfocal distance
4.91 m
Sharp from (focused at hyperfocal)
43 mm f/6.1
Full-frame equivalent
53°
Diagonal angle of view
Depth of field by subject distance#
28 mm at f/4 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 distance | Near limit | Far limit | Total DoF | Front / behind | Background blur |
|---|---|---|---|---|---|
| 30.0 cm (0.98 ft) | 29.2 cm | 30.9 cm | 1.7 cm | 49% / 51% | 3.07% |
| 50.0 cm (1.64 ft) | 47.7 cm | 52.5 cm | 4.8 cm | 48% / 52% | 1.77% |
| 75.0 cm (2.46 ft) | 69.9 cm | 81.0 cm | 11.1 cm | 46% / 54% | 1.16% |
| 1.00 m (3.28 ft) | 91.0 cm | 1.11 m | 20.0 cm | 45% / 55% | 0.86% |
| 1.50 m (4.92 ft) | 1.30 m | 1.77 m | 46.1 cm | 42% / 58% | 0.57% |
| 2.00 m (6.56 ft) | 1.66 m | 2.50 m | 83.9 cm | 40% / 60% | 0.42% |
| 3.00 m (9.84 ft) | 2.30 m | 4.31 m | 2.00 m | 35% / 65% | 0.28% |
| 4.00 m (13.1 ft) | 2.85 m | 6.73 m | 3.88 m | 30% / 70% | 0.21% |
| 5.00 m (16.4 ft) | 3.32 m | 10.1 m | 6.83 m | 25% / 75% | 0.17% |
| 7.00 m (23.0 ft) | 4.09 m | 24.3 m | 20.2 m | 14% / 86% | 0.12% |
| 10.0 m (32.8 ft) | 4.96 m | ∞ | ∞ | — | 0.08% |
| 15.0 m (49.2 ft) | 5.93 m | ∞ | ∞ | — | 0.06% |
| 20.0 m (65.6 ft) | 6.58 m | ∞ | ∞ | — | 0.04% |
| 30.0 m (98.4 ft) | 7.39 m | ∞ | ∞ | — | 0.03% |
| 50.0 m (164 ft) | 8.20 m | ∞ | ∞ | — | 0.02% |
| 100 m (328 ft) | 8.93 m | ∞ | ∞ | — | 0.01% |
Try other settings#
Near limit—
Far limit—
Depth of field—
Hyperfocal distance—
In front / behind—
28 mm at other apertures (subject at 3 m)#
Other focal lengths at f/4#
| Focal length | Subject at | Total DoF |
|---|---|---|
| 14 mm | 3.00 m | ∞ |
| 16 mm | 3.00 m | 42.9 m |
| 20 mm | 3.00 m | 5.55 m |
| 24 mm | 3.00 m | 2.99 m |
| 28 mm | 3.00 m | 2.00 m |
| 35 mm | 3.00 m | 1.21 m |
| 40 mm | 3.00 m | 90.8 cm |
| 50 mm | 3.00 m | 57.1 cm |
| 85 mm | 3.00 m | 19.4 cm |
| 105 mm | 3.00 m | 12.6 cm |
| 135 mm | 3.00 m | 7.5 cm |
| 200 mm | 10.0 m | 39.2 cm |
| 300 mm | 10.0 m | 17.2 cm |
| 400 mm | 10.0 m | 9.6 cm |
| 600 mm | 10.0 m | 4.2 cm |
Same lens settings on other formats#
When to use it#
At f/4, a 28 mm lens on APS-C is a natural choice for general photography. Focused at 3 m you get 2.00 m of sharp zone; for maximum front-to-back sharpness focus at 9.83 m and everything from 4.91 m to infinity will be acceptably sharp.
See also the f/4 aperture guide.
Frequently asked questions#
What is the depth of field of a 28mm lens at f/4?
On APS-C, focused at 3 m, it is 2.00 m; at 1 m it is 20.0 cm.
What is the hyperfocal distance for 28mm f/4?
9.83 m (32.2 ft) on APS-C. Everything from 4.91 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources