138 m
Hyperfocal distance
69.0 m
Sharp from (focused at hyperfocal)
161 mm f/6.1
Full-frame equivalent
15°
Diagonal angle of view
Depth of field by subject distance#
105 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) | 30.0 cm | 30.0 cm | 0.1 cm | 50% / 50% | 60.15% |
| 50.0 cm (1.64 ft) | 49.9 cm | 50.1 cm | 0.3 cm | 50% / 50% | 29.69% |
| 75.0 cm (2.46 ft) | 74.7 cm | 75.4 cm | 0.7 cm | 50% / 50% | 18.18% |
| 1.00 m (3.28 ft) | 99.4 cm | 1.01 m | 1.3 cm | 50% / 50% | 13.10% |
| 1.50 m (4.92 ft) | 1.48 m | 1.52 m | 3.0 cm | 49% / 51% | 8.41% |
| 2.00 m (6.56 ft) | 1.97 m | 2.03 m | 5.5 cm | 49% / 51% | 6.19% |
| 3.00 m (9.84 ft) | 2.94 m | 3.06 m | 12.6 cm | 49% / 51% | 4.05% |
| 4.00 m (13.1 ft) | 3.89 m | 4.12 m | 22.6 cm | 49% / 51% | 3.01% |
| 5.00 m (16.4 ft) | 4.83 m | 5.18 m | 35.6 cm | 48% / 52% | 2.40% |
| 7.00 m (23.0 ft) | 6.67 m | 7.37 m | 70.2 cm | 47% / 53% | 1.70% |
| 10.0 m (32.8 ft) | 9.33 m | 10.8 m | 1.44 m | 46% / 54% | 1.19% |
| 15.0 m (49.2 ft) | 13.5 m | 16.8 m | 3.28 m | 45% / 55% | 0.79% |
| 20.0 m (65.6 ft) | 17.5 m | 23.4 m | 5.90 m | 43% / 57% | 0.59% |
| 30.0 m (98.4 ft) | 24.7 m | 38.3 m | 13.7 m | 39% / 61% | 0.39% |
| 50.0 m (164 ft) | 36.7 m | 78.4 m | 41.7 m | 32% / 68% | 0.24% |
| 100 m (328 ft) | 58.0 m | 363 m | 305 m | 14% / 86% | 0.12% |
Try other settings#
Near limit—
Far limit—
Depth of field—
Hyperfocal distance—
In front / behind—
105 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 105 mm lens on APS-C is a natural choice for general photography. Focused at 3 m you get 12.6 cm of sharp zone; for maximum front-to-back sharpness focus at 138 m and everything from 69.0 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 105mm lens at f/4?
On APS-C, focused at 3 m, it is 12.6 cm; at 1 m it is 1.3 cm.
What is the hyperfocal distance for 105mm f/4?
138 m (452 ft) on APS-C. Everything from 69.0 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources