31.3 m
Hyperfocal distance
15.7 m
Sharp from (focused at hyperfocal)
77 mm f/6.1
Full-frame equivalent
32°
Diagonal angle of view
Depth of field by subject distance#
50 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) | 29.8 cm | 30.2 cm | 0.5 cm | 50% / 50% | 10.64% |
| 50.0 cm (1.64 ft) | 49.3 cm | 50.7 cm | 1.4 cm | 49% / 51% | 5.91% |
| 75.0 cm (2.46 ft) | 73.4 cm | 76.7 cm | 3.4 cm | 49% / 51% | 3.80% |
| 1.00 m (3.28 ft) | 97.0 cm | 1.03 m | 6.1 cm | 48% / 52% | 2.80% |
| 1.50 m (4.92 ft) | 1.43 m | 1.57 m | 14.0 cm | 48% / 52% | 1.83% |
| 2.00 m (6.56 ft) | 1.88 m | 2.13 m | 25.1 cm | 47% / 53% | 1.36% |
| 3.00 m (9.84 ft) | 2.74 m | 3.31 m | 57.1 cm | 45% / 55% | 0.90% |
| 4.00 m (13.1 ft) | 3.55 m | 4.58 m | 1.03 m | 44% / 56% | 0.67% |
| 5.00 m (16.4 ft) | 4.32 m | 5.94 m | 1.62 m | 42% / 58% | 0.54% |
| 7.00 m (23.0 ft) | 5.73 m | 9.00 m | 3.28 m | 39% / 61% | 0.38% |
| 10.0 m (32.8 ft) | 7.58 m | 14.7 m | 7.09 m | 34% / 66% | 0.27% |
| 15.0 m (49.2 ft) | 10.1 m | 28.8 m | 18.6 m | 26% / 74% | 0.18% |
| 20.0 m (65.6 ft) | 12.2 m | 55.3 m | 43.1 m | 18% / 82% | 0.13% |
| 30.0 m (98.4 ft) | 15.3 m | 721 m | 706 m | 2% / 98% | 0.09% |
| 50.0 m (164 ft) | 19.2 m | ∞ | ∞ | — | 0.05% |
| 100 m (328 ft) | 23.8 m | ∞ | ∞ | — | 0.03% |
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/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 50 mm lens on APS-C is a natural choice for general photography. Focused at 3 m you get 57.1 cm of sharp zone; for maximum front-to-back sharpness focus at 31.3 m and everything from 15.7 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 50mm lens at f/4?
On APS-C, focused at 3 m, it is 57.1 cm; at 1 m it is 6.1 cm.
What is the hyperfocal distance for 50mm f/4?
31.3 m (103 ft) on APS-C. Everything from 15.7 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources