434 m
Hyperfocal distance
217 m
Sharp from (focused at hyperfocal)
270 mm f/5.6
Full-frame equivalent
9°
Diagonal angle of view
Depth of field by subject distance#
135 mm at f/2.8 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% | 228.02% |
| 50.0 cm (1.64 ft) | 50.0 cm | 50.0 cm | 0.1 cm | 50% / 50% | 103.08% |
| 75.0 cm (2.46 ft) | 74.9 cm | 75.1 cm | 0.2 cm | 50% / 50% | 61.18% |
| 1.00 m (3.28 ft) | 99.8 cm | 1.00 m | 0.4 cm | 50% / 50% | 43.50% |
| 1.50 m (4.92 ft) | 1.50 m | 1.50 m | 0.9 cm | 50% / 50% | 27.56% |
| 2.00 m (6.56 ft) | 1.99 m | 2.01 m | 1.7 cm | 50% / 50% | 20.17% |
| 3.00 m (9.84 ft) | 2.98 m | 3.02 m | 4.0 cm | 50% / 50% | 13.13% |
| 4.00 m (13.1 ft) | 3.96 m | 4.04 m | 7.1 cm | 50% / 50% | 9.73% |
| 5.00 m (16.4 ft) | 4.94 m | 5.06 m | 11.2 cm | 49% / 51% | 7.73% |
| 7.00 m (23.0 ft) | 6.89 m | 7.11 m | 22.2 cm | 49% / 51% | 5.48% |
| 10.0 m (32.8 ft) | 9.78 m | 10.2 m | 45.5 cm | 49% / 51% | 3.81% |
| 15.0 m (49.2 ft) | 14.5 m | 15.5 m | 1.03 m | 48% / 52% | 2.53% |
| 20.0 m (65.6 ft) | 19.1 m | 21.0 m | 1.84 m | 48% / 52% | 1.89% |
| 30.0 m (98.4 ft) | 28.1 m | 32.2 m | 4.15 m | 47% / 53% | 1.26% |
| 50.0 m (164 ft) | 44.8 m | 56.5 m | 11.6 m | 44% / 56% | 0.75% |
| 100 m (328 ft) | 81.3 m | 130 m | 48.6 m | 38% / 62% | 0.38% |
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 Micro Four Thirds is a natural choice for portraits and subject isolation. Focused at 3 m you get 4.0 cm of sharp zone; for maximum front-to-back sharpness focus at 434 m and everything from 217 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 Micro Four Thirds, focused at 3 m, it is 4.0 cm; at 1 m it is 0.4 cm.
What is the hyperfocal distance for 135mm f/2.8?
434 m (1424 ft) on Micro Four Thirds. Everything from 217 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources