228 m
Hyperfocal distance
114 m
Sharp from (focused at hyperfocal)
207 mm f/6.1
Full-frame equivalent
12°
Diagonal angle of view
Depth of field by subject distance#
135 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 | 0.0 cm | 50% / 50% | 117.50% |
| 50.0 cm (1.64 ft) | 49.9 cm | 50.1 cm | 0.2 cm | 50% / 50% | 53.12% |
| 75.0 cm (2.46 ft) | 74.8 cm | 75.2 cm | 0.4 cm | 50% / 50% | 31.53% |
| 1.00 m (3.28 ft) | 99.6 cm | 1.00 m | 0.8 cm | 50% / 50% | 22.41% |
| 1.50 m (4.92 ft) | 1.49 m | 1.51 m | 1.8 cm | 50% / 50% | 14.20% |
| 2.00 m (6.56 ft) | 1.98 m | 2.02 m | 3.3 cm | 50% / 50% | 10.40% |
| 3.00 m (9.84 ft) | 2.96 m | 3.04 m | 7.5 cm | 49% / 51% | 6.77% |
| 4.00 m (13.1 ft) | 3.93 m | 4.07 m | 13.6 cm | 49% / 51% | 5.02% |
| 5.00 m (16.4 ft) | 4.90 m | 5.11 m | 21.4 cm | 49% / 51% | 3.99% |
| 7.00 m (23.0 ft) | 6.80 m | 7.22 m | 42.2 cm | 48% / 52% | 2.82% |
| 10.0 m (32.8 ft) | 9.58 m | 10.5 m | 86.8 cm | 48% / 52% | 1.97% |
| 15.0 m (49.2 ft) | 14.1 m | 16.0 m | 1.97 m | 47% / 53% | 1.30% |
| 20.0 m (65.6 ft) | 18.4 m | 21.9 m | 3.51 m | 46% / 54% | 0.98% |
| 30.0 m (98.4 ft) | 26.5 m | 34.5 m | 8.00 m | 43% / 57% | 0.65% |
| 50.0 m (164 ft) | 41.0 m | 64.0 m | 23.0 m | 39% / 61% | 0.39% |
| 100 m (328 ft) | 69.5 m | 178 m | 109 m | 28% / 72% | 0.19% |
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 | 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 135 mm lens on APS-C is a natural choice for general photography. Focused at 3 m you get 7.5 cm of sharp zone; for maximum front-to-back sharpness focus at 228 m and everything from 114 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 APS-C, focused at 3 m, it is 7.5 cm; at 1 m it is 0.8 cm.
What is the hyperfocal distance for 135mm f/4?
228 m (748 ft) on APS-C. Everything from 114 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources