338 m
Hyperfocal distance
169 m
Sharp from (focused at hyperfocal)
135 mm f/1.8
Full-frame equivalent
18°
Diagonal angle of view
Depth of field by subject distance#
135 mm at f/1.8 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 | 0.0 cm | 50% / 50% | 170.45% |
| 50.0 cm (1.64 ft) | 49.9 cm | 50.1 cm | 0.1 cm | 50% / 50% | 77.05% |
| 75.0 cm (2.46 ft) | 74.9 cm | 75.1 cm | 0.3 cm | 50% / 50% | 45.73% |
| 1.00 m (3.28 ft) | 99.7 cm | 1.00 m | 0.5 cm | 50% / 50% | 32.51% |
| 1.50 m (4.92 ft) | 1.49 m | 1.51 m | 1.2 cm | 50% / 50% | 20.60% |
| 2.00 m (6.56 ft) | 1.99 m | 2.01 m | 2.2 cm | 50% / 50% | 15.08% |
| 3.00 m (9.84 ft) | 2.97 m | 3.03 m | 5.1 cm | 50% / 50% | 9.82% |
| 4.00 m (13.1 ft) | 3.95 m | 4.05 m | 9.2 cm | 49% / 51% | 7.28% |
| 5.00 m (16.4 ft) | 4.93 m | 5.07 m | 14.4 cm | 49% / 51% | 5.78% |
| 7.00 m (23.0 ft) | 6.86 m | 7.15 m | 28.5 cm | 49% / 51% | 4.10% |
| 10.0 m (32.8 ft) | 9.72 m | 10.3 m | 58.5 cm | 49% / 51% | 2.85% |
| 15.0 m (49.2 ft) | 14.4 m | 15.7 m | 1.32 m | 48% / 52% | 1.89% |
| 20.0 m (65.6 ft) | 18.9 m | 21.3 m | 2.36 m | 47% / 53% | 1.42% |
| 30.0 m (98.4 ft) | 27.6 m | 32.9 m | 5.35 m | 46% / 54% | 0.94% |
| 50.0 m (164 ft) | 43.6 m | 58.7 m | 15.1 m | 43% / 57% | 0.56% |
| 100 m (328 ft) | 77.2 m | 142 m | 64.9 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/1.8#
Same lens settings on other formats#
When to use it#
At f/1.8, a 135 mm lens on full frame is a natural choice for portraits and subject isolation. Focused at 3 m you get 5.1 cm of sharp zone; for maximum front-to-back sharpness focus at 338 m and everything from 169 m to infinity will be acceptably sharp.
See also the f/1.8 aperture guide.
Frequently asked questions#
What is the depth of field of a 135mm lens at f/1.8?
On full frame, focused at 3 m, it is 5.1 cm; at 1 m it is 0.5 cm.
What is the hyperfocal distance for 135mm f/1.8?
338 m (1108 ft) on full frame. Everything from 169 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources