326 m
Hyperfocal distance
163 m
Sharp from (focused at hyperfocal)
207 mm f/4.3
Full-frame equivalent
12°
Diagonal angle of view
Depth of field by subject distance#
135 mm at f/2.8 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% | 167.86% |
| 50.0 cm (1.64 ft) | 49.9 cm | 50.1 cm | 0.1 cm | 50% / 50% | 75.88% |
| 75.0 cm (2.46 ft) | 74.9 cm | 75.1 cm | 0.3 cm | 50% / 50% | 45.04% |
| 1.00 m (3.28 ft) | 99.7 cm | 1.00 m | 0.5 cm | 50% / 50% | 32.02% |
| 1.50 m (4.92 ft) | 1.49 m | 1.51 m | 1.3 cm | 50% / 50% | 20.29% |
| 2.00 m (6.56 ft) | 1.99 m | 2.01 m | 2.3 cm | 50% / 50% | 14.85% |
| 3.00 m (9.84 ft) | 2.97 m | 3.03 m | 5.3 cm | 50% / 50% | 9.67% |
| 4.00 m (13.1 ft) | 3.95 m | 4.05 m | 9.5 cm | 49% / 51% | 7.17% |
| 5.00 m (16.4 ft) | 4.93 m | 5.08 m | 15.0 cm | 49% / 51% | 5.69% |
| 7.00 m (23.0 ft) | 6.86 m | 7.15 m | 29.5 cm | 49% / 51% | 4.03% |
| 10.0 m (32.8 ft) | 9.71 m | 10.3 m | 60.7 cm | 48% / 52% | 2.81% |
| 15.0 m (49.2 ft) | 14.3 m | 15.7 m | 1.37 m | 48% / 52% | 1.86% |
| 20.0 m (65.6 ft) | 18.8 m | 21.3 m | 2.45 m | 47% / 53% | 1.39% |
| 30.0 m (98.4 ft) | 27.5 m | 33.0 m | 5.55 m | 45% / 55% | 0.93% |
| 50.0 m (164 ft) | 43.4 m | 59.0 m | 15.7 m | 42% / 58% | 0.56% |
| 100 m (328 ft) | 76.5 m | 144 m | 67.8 m | 35% / 65% | 0.28% |
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/2.8#
Same lens settings on other formats#
When to use it#
At f/2.8, a 135 mm lens on APS-C is a natural choice for portraits and subject isolation. Focused at 3 m you get 5.3 cm of sharp zone; for maximum front-to-back sharpness focus at 326 m and everything from 163 m to infinity will be acceptably sharp.
See also the f/2.8 aperture guide.
Frequently asked questions#
What is the depth of field of a 135mm lens at f/2.8?
On APS-C, focused at 3 m, it is 5.3 cm; at 1 m it is 0.5 cm.
What is the hyperfocal distance for 135mm f/2.8?
326 m (1068 ft) on APS-C. Everything from 163 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources