69.5 m
Hyperfocal distance
34.7 m
Sharp from (focused at hyperfocal)
77 mm f/2.8
Full-frame equivalent
32°
Diagonal angle of view
Depth of field by subject distance#
50 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 distance | Near limit | Far limit | Total DoF | Front / behind | Background blur |
|---|---|---|---|---|---|
| 30.0 cm (0.98 ft) | 29.9 cm | 30.1 cm | 0.2 cm | 50% / 50% | 23.64% |
| 50.0 cm (1.64 ft) | 49.7 cm | 50.3 cm | 0.6 cm | 50% / 50% | 13.13% |
| 75.0 cm (2.46 ft) | 74.3 cm | 75.8 cm | 1.5 cm | 49% / 51% | 8.44% |
| 1.00 m (3.28 ft) | 98.7 cm | 1.01 m | 2.7 cm | 49% / 51% | 6.22% |
| 1.50 m (4.92 ft) | 1.47 m | 1.53 m | 6.3 cm | 49% / 51% | 4.08% |
| 2.00 m (6.56 ft) | 1.95 m | 2.06 m | 11.2 cm | 49% / 51% | 3.03% |
| 3.00 m (9.84 ft) | 2.88 m | 3.13 m | 25.5 cm | 48% / 52% | 2.00% |
| 4.00 m (13.1 ft) | 3.78 m | 4.24 m | 45.7 cm | 47% / 53% | 1.50% |
| 5.00 m (16.4 ft) | 4.67 m | 5.38 m | 71.6 cm | 46% / 54% | 1.19% |
| 7.00 m (23.0 ft) | 6.36 m | 7.78 m | 1.42 m | 45% / 55% | 0.85% |
| 10.0 m (32.8 ft) | 8.75 m | 11.7 m | 2.93 m | 43% / 57% | 0.59% |
| 15.0 m (49.2 ft) | 12.3 m | 19.1 m | 6.77 m | 39% / 61% | 0.40% |
| 20.0 m (65.6 ft) | 15.5 m | 28.1 m | 12.5 m | 36% / 64% | 0.30% |
| 30.0 m (98.4 ft) | 21.0 m | 52.8 m | 31.8 m | 28% / 72% | 0.20% |
| 50.0 m (164 ft) | 29.1 m | 178 m | 149 m | 14% / 86% | 0.12% |
| 100 m (328 ft) | 41.0 m | ∞ | ∞ | — | 0.06% |
Try other settings#
Near limit—
Far limit—
Depth of field—
Hyperfocal distance—
In front / behind—
50 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 50 mm lens on APS-C is a natural choice for portraits and subject isolation. Focused at 3 m you get 25.5 cm of sharp zone; for maximum front-to-back sharpness focus at 69.5 m and everything from 34.7 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 50mm lens at f/1.8?
On APS-C, focused at 3 m, it is 25.5 cm; at 1 m it is 2.7 cm.
What is the hyperfocal distance for 50mm f/1.8?
69.5 m (228 ft) on APS-C. Everything from 34.7 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources