7.31 m
Hyperfocal distance
3.66 m
Sharp from (focused at hyperfocal)
61 mm f/16.9
Full-frame equivalent
39°
Diagonal angle of view
Depth of field by subject distance#
40 mm at f/11 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) | 29.0 cm | 31.1 cm | 2.1 cm | 48% / 52% | 2.38% |
| 50.0 cm (1.64 ft) | 47.0 cm | 53.4 cm | 6.4 cm | 47% / 53% | 1.35% |
| 75.0 cm (2.46 ft) | 68.3 cm | 83.1 cm | 14.8 cm | 45% / 55% | 0.87% |
| 1.00 m (3.28 ft) | 88.3 cm | 1.15 m | 26.9 cm | 43% / 57% | 0.64% |
| 1.50 m (4.92 ft) | 1.25 m | 1.88 m | 62.8 cm | 40% / 60% | 0.42% |
| 2.00 m (6.56 ft) | 1.58 m | 2.74 m | 1.16 m | 37% / 63% | 0.32% |
| 3.00 m (9.84 ft) | 2.13 m | 5.06 m | 2.93 m | 30% / 70% | 0.21% |
| 4.00 m (13.1 ft) | 2.59 m | 8.78 m | 6.19 m | 23% / 77% | 0.16% |
| 5.00 m (16.4 ft) | 2.97 m | 15.7 m | 12.8 m | 16% / 84% | 0.12% |
| 7.00 m (23.0 ft) | 3.58 m | 163 m | 159 m | 2% / 98% | 0.09% |
| 10.0 m (32.8 ft) | 4.22 m | ∞ | ∞ | — | 0.06% |
| 15.0 m (49.2 ft) | 4.91 m | ∞ | ∞ | — | 0.04% |
| 20.0 m (65.6 ft) | 5.34 m | ∞ | ∞ | — | 0.03% |
| 30.0 m (98.4 ft) | 5.86 m | ∞ | ∞ | — | 0.02% |
| 50.0 m (164 ft) | 6.35 m | ∞ | ∞ | — | 0.01% |
| 100 m (328 ft) | 6.78 m | ∞ | ∞ | — | 0.01% |
Try other settings#
Near limit—
Far limit—
Depth of field—
Hyperfocal distance—
In front / behind—
40 mm at other apertures (subject at 3 m)#
Other focal lengths at f/11#
Same lens settings on other formats#
When to use it#
At f/11, a 40 mm lens on APS-C is a natural choice for landscapes and architecture where front-to-back sharpness matters. Focused at 3 m you get 2.93 m of sharp zone; for maximum front-to-back sharpness focus at 7.31 m and everything from 3.66 m to infinity will be acceptably sharp.
See also the f/11 aperture guide.
Frequently asked questions#
What is the depth of field of a 40mm lens at f/11?
On APS-C, focused at 3 m, it is 2.93 m; at 1 m it is 26.9 cm.
What is the hyperfocal distance for 40mm f/11?
7.31 m (24.0 ft) on APS-C. Everything from 3.66 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources