9.36 m
Hyperfocal distance
4.68 m
Sharp from (focused at hyperfocal)
28 mm f/2.8
Full-frame equivalent
75°
Diagonal angle of view
Depth of field by subject distance#
28 mm at f/2.8 on full frame (36×24 mm), circle of confusion 30 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 | 1.8 cm | 49% / 51% | 2.86% |
| 50.0 cm (1.64 ft) | 47.6 cm | 52.7 cm | 5.1 cm | 47% / 53% | 1.65% |
| 75.0 cm (2.46 ft) | 69.6 cm | 81.3 cm | 11.7 cm | 46% / 54% | 1.08% |
| 1.00 m (3.28 ft) | 90.6 cm | 1.12 m | 21.1 cm | 45% / 55% | 0.80% |
| 1.50 m (4.92 ft) | 1.30 m | 1.78 m | 48.5 cm | 42% / 58% | 0.53% |
| 2.00 m (6.56 ft) | 1.65 m | 2.54 m | 88.5 cm | 39% / 61% | 0.39% |
| 3.00 m (9.84 ft) | 2.28 m | 4.40 m | 2.13 m | 34% / 66% | 0.26% |
| 4.00 m (13.1 ft) | 2.81 m | 6.96 m | 4.16 m | 29% / 71% | 0.20% |
| 5.00 m (16.4 ft) | 3.26 m | 10.7 m | 7.44 m | 23% / 77% | 0.16% |
| 7.00 m (23.0 ft) | 4.01 m | 27.7 m | 23.7 m | 13% / 87% | 0.11% |
| 10.0 m (32.8 ft) | 4.83 m | ∞ | ∞ | — | 0.08% |
| 15.0 m (49.2 ft) | 5.76 m | ∞ | ∞ | — | 0.05% |
| 20.0 m (65.6 ft) | 6.37 m | ∞ | ∞ | — | 0.04% |
| 30.0 m (98.4 ft) | 7.12 m | ∞ | ∞ | — | 0.03% |
| 50.0 m (164 ft) | 7.87 m | ∞ | ∞ | — | 0.02% |
| 100 m (328 ft) | 8.54 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/2.8#
Same lens settings on other formats#
When to use it#
At f/2.8, a 28 mm lens on full frame is a natural choice for environmental portraits, street and low light. Focused at 3 m you get 2.13 m of sharp zone; for maximum front-to-back sharpness focus at 9.36 m and everything from 4.68 m to infinity will be acceptably sharp.
See also the f/2.8 aperture guide.
Frequently asked questions#
What is the depth of field of a 28mm lens at f/2.8?
On full frame, focused at 3 m, it is 2.13 m; at 1 m it is 21.1 cm.
What is the hyperfocal distance for 28mm f/2.8?
9.36 m (30.7 ft) on full frame. Everything from 4.68 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources