456 m
Hyperfocal distance
228 m
Sharp from (focused at hyperfocal)
207 mm f/3.1
Full-frame equivalent
12°
Diagonal angle of view
Depth of field by subject distance#
135 mm at f/2 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% | 235.01% |
| 50.0 cm (1.64 ft) | 50.0 cm | 50.0 cm | 0.1 cm | 50% / 50% | 106.24% |
| 75.0 cm (2.46 ft) | 74.9 cm | 75.1 cm | 0.2 cm | 50% / 50% | 63.05% |
| 1.00 m (3.28 ft) | 99.8 cm | 1.00 m | 0.4 cm | 50% / 50% | 44.83% |
| 1.50 m (4.92 ft) | 1.50 m | 1.50 m | 0.9 cm | 50% / 50% | 28.41% |
| 2.00 m (6.56 ft) | 1.99 m | 2.01 m | 1.6 cm | 50% / 50% | 20.79% |
| 3.00 m (9.84 ft) | 2.98 m | 3.02 m | 3.8 cm | 50% / 50% | 13.53% |
| 4.00 m (13.1 ft) | 3.97 m | 4.03 m | 6.8 cm | 50% / 50% | 10.03% |
| 5.00 m (16.4 ft) | 4.95 m | 5.05 m | 10.7 cm | 49% / 51% | 7.97% |
| 7.00 m (23.0 ft) | 6.90 m | 7.11 m | 21.1 cm | 49% / 51% | 5.65% |
| 10.0 m (32.8 ft) | 9.79 m | 10.2 m | 43.3 cm | 49% / 51% | 3.93% |
| 15.0 m (49.2 ft) | 14.5 m | 15.5 m | 98.0 cm | 48% / 52% | 2.61% |
| 20.0 m (65.6 ft) | 19.2 m | 20.9 m | 1.75 m | 48% / 52% | 1.95% |
| 30.0 m (98.4 ft) | 28.2 m | 32.1 m | 3.95 m | 47% / 53% | 1.30% |
| 50.0 m (164 ft) | 45.1 m | 56.1 m | 11.1 m | 45% / 55% | 0.78% |
| 100 m (328 ft) | 82.0 m | 128 m | 46.0 m | 39% / 61% | 0.39% |
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#
Same lens settings on other formats#
When to use it#
At f/2, a 135 mm lens on APS-C is a natural choice for portraits and subject isolation. Focused at 3 m you get 3.8 cm of sharp zone; for maximum front-to-back sharpness focus at 456 m and everything from 228 m to infinity will be acceptably sharp.
See also the f/2 aperture guide.
Frequently asked questions#
What is the depth of field of a 135mm lens at f/2?
On APS-C, focused at 3 m, it is 3.8 cm; at 1 m it is 0.4 cm.
What is the hyperfocal distance for 135mm f/2?
456 m (1495 ft) on APS-C. Everything from 228 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources