675 m
Hyperfocal distance
338 m
Sharp from (focused at hyperfocal)
270 mm f/3.6
Full-frame equivalent
9°
Diagonal angle of view
Depth of field by subject distance#
135 mm at f/1.8 on Micro Four Thirds (17.3×13 mm), circle of confusion 15 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% | 354.70% |
| 50.0 cm (1.64 ft) | 50.0 cm | 50.0 cm | 0.1 cm | 50% / 50% | 160.35% |
| 75.0 cm (2.46 ft) | 74.9 cm | 75.1 cm | 0.1 cm | 50% / 50% | 95.16% |
| 1.00 m (3.28 ft) | 99.9 cm | 1.00 m | 0.3 cm | 50% / 50% | 67.66% |
| 1.50 m (4.92 ft) | 1.50 m | 1.50 m | 0.6 cm | 50% / 50% | 42.88% |
| 2.00 m (6.56 ft) | 1.99 m | 2.01 m | 1.1 cm | 50% / 50% | 31.38% |
| 3.00 m (9.84 ft) | 2.99 m | 3.01 m | 2.5 cm | 50% / 50% | 20.43% |
| 4.00 m (13.1 ft) | 3.98 m | 4.02 m | 4.6 cm | 50% / 50% | 15.14% |
| 5.00 m (16.4 ft) | 4.96 m | 5.04 m | 7.2 cm | 50% / 50% | 12.03% |
| 7.00 m (23.0 ft) | 6.93 m | 7.07 m | 14.2 cm | 49% / 51% | 8.53% |
| 10.0 m (32.8 ft) | 9.86 m | 10.1 m | 29.2 cm | 49% / 51% | 5.93% |
| 15.0 m (49.2 ft) | 14.7 m | 15.3 m | 66.1 cm | 49% / 51% | 3.94% |
| 20.0 m (65.6 ft) | 19.4 m | 20.6 m | 1.18 m | 49% / 51% | 2.95% |
| 30.0 m (98.4 ft) | 28.7 m | 31.4 m | 2.66 m | 48% / 52% | 1.96% |
| 50.0 m (164 ft) | 46.6 m | 54.0 m | 7.43 m | 46% / 54% | 1.17% |
| 100 m (328 ft) | 87.1 m | 117 m | 30.3 m | 43% / 57% | 0.59% |
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 Micro Four Thirds is a natural choice for portraits and subject isolation. Focused at 3 m you get 2.5 cm of sharp zone; for maximum front-to-back sharpness focus at 675 m and everything from 338 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 Micro Four Thirds, focused at 3 m, it is 2.5 cm; at 1 m it is 0.3 cm.
What is the hyperfocal distance for 135mm f/1.8?
675 m (2215 ft) on Micro Four Thirds. Everything from 338 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources