152 m
Hyperfocal distance
76.0 m
Sharp from (focused at hyperfocal)
135 mm f/4.0
Full-frame equivalent
18°
Diagonal angle of view
Depth of field by subject distance#
135 mm at f/4 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) | 30.0 cm | 30.0 cm | 0.1 cm | 50% / 50% | 76.70% |
| 50.0 cm (1.64 ft) | 49.9 cm | 50.1 cm | 0.2 cm | 50% / 50% | 34.67% |
| 75.0 cm (2.46 ft) | 74.7 cm | 75.3 cm | 0.6 cm | 50% / 50% | 20.58% |
| 1.00 m (3.28 ft) | 99.4 cm | 1.01 m | 1.1 cm | 50% / 50% | 14.63% |
| 1.50 m (4.92 ft) | 1.49 m | 1.51 m | 2.7 cm | 50% / 50% | 9.27% |
| 2.00 m (6.56 ft) | 1.98 m | 2.02 m | 4.9 cm | 49% / 51% | 6.79% |
| 3.00 m (9.84 ft) | 2.94 m | 3.06 m | 11.3 cm | 49% / 51% | 4.42% |
| 4.00 m (13.1 ft) | 3.90 m | 4.10 m | 20.4 cm | 49% / 51% | 3.27% |
| 5.00 m (16.4 ft) | 4.84 m | 5.17 m | 32.1 cm | 48% / 52% | 2.60% |
| 7.00 m (23.0 ft) | 6.70 m | 7.33 m | 63.4 cm | 48% / 52% | 1.84% |
| 10.0 m (32.8 ft) | 9.39 m | 10.7 m | 1.30 m | 47% / 53% | 1.28% |
| 15.0 m (49.2 ft) | 13.7 m | 16.6 m | 2.96 m | 45% / 55% | 0.85% |
| 20.0 m (65.6 ft) | 17.7 m | 23.0 m | 5.32 m | 43% / 57% | 0.64% |
| 30.0 m (98.4 ft) | 25.1 m | 37.3 m | 12.3 m | 40% / 60% | 0.42% |
| 50.0 m (164 ft) | 37.6 m | 74.4 m | 36.8 m | 34% / 66% | 0.25% |
| 100 m (328 ft) | 60.3 m | 292 m | 232 m | 17% / 83% | 0.13% |
Try other settings#
Near limit—
Far limit—
Depth of field—
Hyperfocal distance—
In front / behind—
135 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 | ∞ |
| 20 mm | 3.00 m | 26.7 m |
| 24 mm | 3.00 m | 6.04 m |
| 28 mm | 3.00 m | 3.44 m |
| 35 mm | 3.00 m | 1.90 m |
| 40 mm | 3.00 m | 1.40 m |
| 50 mm | 3.00 m | 86.7 cm |
| 85 mm | 3.00 m | 29.1 cm |
| 105 mm | 3.00 m | 18.9 cm |
| 135 mm | 3.00 m | 11.3 cm |
| 200 mm | 10.0 m | 58.9 cm |
| 300 mm | 10.0 m | 25.9 cm |
| 400 mm | 10.0 m | 14.4 cm |
| 600 mm | 10.0 m | 6.3 cm |
Same lens settings on other formats#
When to use it#
At f/4, a 135 mm lens on full frame is a natural choice for general photography. Focused at 3 m you get 11.3 cm of sharp zone; for maximum front-to-back sharpness focus at 152 m and everything from 76.0 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 135mm lens at f/4?
On full frame, focused at 3 m, it is 11.3 cm; at 1 m it is 1.1 cm.
What is the hyperfocal distance for 135mm f/4?
152 m (499 ft) on full frame. Everything from 76.0 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources