46.3 m
Hyperfocal distance
23.2 m
Sharp from (focused at hyperfocal)
50 mm f/1.8
Full-frame equivalent
47°
Diagonal angle of view
Depth of field by subject distance#
50 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) | 29.8 cm | 30.2 cm | 0.3 cm | 50% / 50% | 15.43% |
| 50.0 cm (1.64 ft) | 49.5 cm | 50.5 cm | 1.0 cm | 50% / 50% | 8.57% |
| 75.0 cm (2.46 ft) | 73.9 cm | 76.2 cm | 2.3 cm | 49% / 51% | 5.51% |
| 1.00 m (3.28 ft) | 98.0 cm | 1.02 m | 4.1 cm | 49% / 51% | 4.06% |
| 1.50 m (4.92 ft) | 1.45 m | 1.55 m | 9.4 cm | 48% / 52% | 2.66% |
| 2.00 m (6.56 ft) | 1.92 m | 2.09 m | 16.9 cm | 48% / 52% | 1.98% |
| 3.00 m (9.84 ft) | 2.82 m | 3.20 m | 38.4 cm | 47% / 53% | 1.31% |
| 4.00 m (13.1 ft) | 3.69 m | 4.37 m | 68.8 cm | 46% / 54% | 0.98% |
| 5.00 m (16.4 ft) | 4.52 m | 5.60 m | 1.08 m | 45% / 55% | 0.78% |
| 7.00 m (23.0 ft) | 6.09 m | 8.24 m | 2.15 m | 42% / 58% | 0.56% |
| 10.0 m (32.8 ft) | 8.23 m | 12.7 m | 4.51 m | 39% / 61% | 0.39% |
| 15.0 m (49.2 ft) | 11.3 m | 22.2 m | 10.8 m | 34% / 66% | 0.26% |
| 20.0 m (65.6 ft) | 14.0 m | 35.1 m | 21.2 m | 28% / 72% | 0.19% |
| 30.0 m (98.4 ft) | 18.2 m | 85.0 m | 66.8 m | 18% / 82% | 0.13% |
| 50.0 m (164 ft) | 24.1 m | ∞ | ∞ | — | 0.08% |
| 100 m (328 ft) | 31.7 m | ∞ | ∞ | — | 0.04% |
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 full frame is a natural choice for portraits and subject isolation. Focused at 3 m you get 38.4 cm of sharp zone; for maximum front-to-back sharpness focus at 46.3 m and everything from 23.2 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 full frame, focused at 3 m, it is 38.4 cm; at 1 m it is 4.1 cm.
What is the hyperfocal distance for 50mm f/1.8?
46.3 m (152 ft) on full frame. Everything from 23.2 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources