394 m
Hyperfocal distance
197 m
Sharp from (focused at hyperfocal)
161 mm f/2.1
Full-frame equivalent
15°
Diagonal angle of view
Depth of field by subject distance#
105 mm at f/1.4 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 | 0.0 cm | 50% / 50% | 171.85% |
| 50.0 cm (1.64 ft) | 49.9 cm | 50.1 cm | 0.1 cm | 50% / 50% | 84.84% |
| 75.0 cm (2.46 ft) | 74.9 cm | 75.1 cm | 0.2 cm | 50% / 50% | 51.95% |
| 1.00 m (3.28 ft) | 99.8 cm | 1.00 m | 0.5 cm | 50% / 50% | 37.44% |
| 1.50 m (4.92 ft) | 1.49 m | 1.51 m | 1.1 cm | 50% / 50% | 24.02% |
| 2.00 m (6.56 ft) | 1.99 m | 2.01 m | 1.9 cm | 50% / 50% | 17.68% |
| 3.00 m (9.84 ft) | 2.98 m | 3.02 m | 4.4 cm | 50% / 50% | 11.58% |
| 4.00 m (13.1 ft) | 3.96 m | 4.04 m | 7.9 cm | 50% / 50% | 8.60% |
| 5.00 m (16.4 ft) | 4.94 m | 5.06 m | 12.4 cm | 49% / 51% | 6.85% |
| 7.00 m (23.0 ft) | 6.88 m | 7.12 m | 24.5 cm | 49% / 51% | 4.86% |
| 10.0 m (32.8 ft) | 9.75 m | 10.3 m | 50.3 cm | 49% / 51% | 3.39% |
| 15.0 m (49.2 ft) | 14.5 m | 15.6 m | 1.14 m | 48% / 52% | 2.25% |
| 20.0 m (65.6 ft) | 19.0 m | 21.1 m | 2.03 m | 47% / 53% | 1.68% |
| 30.0 m (98.4 ft) | 27.9 m | 32.5 m | 4.58 m | 46% / 54% | 1.12% |
| 50.0 m (164 ft) | 44.4 m | 57.3 m | 12.9 m | 44% / 56% | 0.67% |
| 100 m (328 ft) | 79.8 m | 134 m | 54.2 m | 37% / 63% | 0.34% |
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/1.4#
Same lens settings on other formats#
When to use it#
At f/1.4, a 105 mm lens on APS-C is a natural choice for portraits and subject isolation. Focused at 3 m you get 4.4 cm of sharp zone; for maximum front-to-back sharpness focus at 394 m and everything from 197 m to infinity will be acceptably sharp.
See also the f/1.4 aperture guide.
Frequently asked questions#
What is the depth of field of a 105mm lens at f/1.4?
On APS-C, focused at 3 m, it is 4.4 cm; at 1 m it is 0.5 cm.
What is the hyperfocal distance for 105mm f/1.4?
394 m (1292 ft) on APS-C. Everything from 197 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources