14.5 m
Hyperfocal distance
7.27 m
Sharp from (focused at hyperfocal)
28 mm f/1.8
Full-frame equivalent
75°
Diagonal angle of view
Depth of field by subject distance#
28 mm at f/1.8 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) | 29.4 cm | 30.6 cm | 1.1 cm | 49% / 51% | 4.45% |
| 50.0 cm (1.64 ft) | 48.4 cm | 51.7 cm | 3.3 cm | 48% / 52% | 2.56% |
| 75.0 cm (2.46 ft) | 71.4 cm | 78.9 cm | 7.5 cm | 48% / 52% | 1.68% |
| 1.00 m (3.28 ft) | 93.7 cm | 1.07 m | 13.5 cm | 47% / 53% | 1.24% |
| 1.50 m (4.92 ft) | 1.36 m | 1.67 m | 30.7 cm | 45% / 55% | 0.82% |
| 2.00 m (6.56 ft) | 1.76 m | 2.31 m | 55.4 cm | 43% / 57% | 0.61% |
| 3.00 m (9.84 ft) | 2.49 m | 3.77 m | 1.28 m | 40% / 60% | 0.41% |
| 4.00 m (13.1 ft) | 3.14 m | 5.51 m | 2.37 m | 36% / 64% | 0.30% |
| 5.00 m (16.4 ft) | 3.72 m | 7.60 m | 3.88 m | 33% / 67% | 0.24% |
| 7.00 m (23.0 ft) | 4.73 m | 13.5 m | 8.74 m | 26% / 74% | 0.17% |
| 10.0 m (32.8 ft) | 5.93 m | 31.9 m | 26.0 m | 16% / 84% | 0.12% |
| 15.0 m (49.2 ft) | 7.38 m | ∞ | ∞ | — | 0.08% |
| 20.0 m (65.6 ft) | 8.42 m | ∞ | ∞ | — | 0.06% |
| 30.0 m (98.4 ft) | 9.79 m | ∞ | ∞ | — | 0.04% |
| 50.0 m (164 ft) | 11.3 m | ∞ | ∞ | — | 0.02% |
| 100 m (328 ft) | 12.7 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/1.8#
Same lens settings on other formats#
When to use it#
At f/1.8, a 28 mm lens on full frame is a natural choice for environmental portraits, street and low light. Focused at 3 m you get 1.28 m of sharp zone; for maximum front-to-back sharpness focus at 14.5 m and everything from 7.27 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 28mm lens at f/1.8?
On full frame, focused at 3 m, it is 1.28 m; at 1 m it is 13.5 cm.
What is the hyperfocal distance for 28mm f/1.8?
14.5 m (47.7 ft) on full frame. Everything from 7.27 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources