Depth of field by subject distance#
24 mm at f/1.2 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) | 29.7 cm | 30.3 cm | 0.7 cm | 49% / 51% | 7.40% |
| 50.0 cm (1.64 ft) | 49.0 cm | 51.0 cm | 2.0 cm | 49% / 51% | 4.29% |
| 75.0 cm (2.46 ft) | 72.8 cm | 77.3 cm | 4.5 cm | 48% / 52% | 2.81% |
| 1.00 m (3.28 ft) | 96.1 cm | 1.04 m | 8.1 cm | 48% / 52% | 2.09% |
| 1.50 m (4.92 ft) | 1.41 m | 1.60 m | 18.5 cm | 47% / 53% | 1.38% |
| 2.00 m (6.56 ft) | 1.85 m | 2.18 m | 33.2 cm | 46% / 54% | 1.03% |
| 3.00 m (9.84 ft) | 2.67 m | 3.42 m | 75.6 cm | 44% / 56% | 0.69% |
| 4.00 m (13.1 ft) | 3.43 m | 4.79 m | 1.36 m | 42% / 58% | 0.51% |
| 5.00 m (16.4 ft) | 4.14 m | 6.31 m | 2.17 m | 40% / 60% | 0.41% |
| 7.00 m (23.0 ft) | 5.42 m | 9.87 m | 4.44 m | 35% / 65% | 0.29% |
| 10.0 m (32.8 ft) | 7.06 m | 17.1 m | 10.0 m | 29% / 71% | 0.20% |
| 15.0 m (49.2 ft) | 9.24 m | 39.9 m | 30.7 m | 19% / 81% | 0.14% |
| 20.0 m (65.6 ft) | 10.9 m | 119 m | 108 m | 8% / 92% | 0.10% |
| 30.0 m (98.4 ft) | 13.3 m | ∞ | ∞ | — | 0.07% |
| 50.0 m (164 ft) | 16.2 m | ∞ | ∞ | — | 0.04% |
| 100 m (328 ft) | 19.4 m | ∞ | ∞ | — | 0.02% |
Try other settings#
24 mm at other apertures (subject at 3 m)#
Other focal lengths at f/1.2#
Same lens settings on other formats#
When to use it#
At f/1.2, a 24 mm lens on APS-C is a natural choice for environmental portraits, street and low light. Focused at 3 m you get 75.6 cm of sharp zone; for maximum front-to-back sharpness focus at 24.0 m and everything from 12.0 m to infinity will be acceptably sharp.
See also the f/1.2 aperture guide.
Frequently asked questions#
What is the depth of field of a 24mm lens at f/1.2?
On APS-C, focused at 3 m, it is 75.6 cm; at 1 m it is 8.1 cm.
What is the hyperfocal distance for 24mm f/1.2?
24.0 m (78.8 ft) on APS-C. Everything from 12.0 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources