608 m
Hyperfocal distance
304 m
Sharp from (focused at hyperfocal)
270 mm f/4.0
Full-frame equivalent
9°
Diagonal angle of view
Depth of field by subject distance#
135 mm at f/2 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% | 319.23% |
| 50.0 cm (1.64 ft) | 50.0 cm | 50.0 cm | 0.1 cm | 50% / 50% | 144.31% |
| 75.0 cm (2.46 ft) | 74.9 cm | 75.1 cm | 0.2 cm | 50% / 50% | 85.65% |
| 1.00 m (3.28 ft) | 99.9 cm | 1.00 m | 0.3 cm | 50% / 50% | 60.89% |
| 1.50 m (4.92 ft) | 1.50 m | 1.50 m | 0.7 cm | 50% / 50% | 38.59% |
| 2.00 m (6.56 ft) | 1.99 m | 2.01 m | 1.2 cm | 50% / 50% | 28.24% |
| 3.00 m (9.84 ft) | 2.99 m | 3.01 m | 2.8 cm | 50% / 50% | 18.39% |
| 4.00 m (13.1 ft) | 3.97 m | 4.03 m | 5.1 cm | 50% / 50% | 13.63% |
| 5.00 m (16.4 ft) | 4.96 m | 5.04 m | 8.0 cm | 50% / 50% | 10.83% |
| 7.00 m (23.0 ft) | 6.92 m | 7.08 m | 15.8 cm | 49% / 51% | 7.67% |
| 10.0 m (32.8 ft) | 9.84 m | 10.2 m | 32.5 cm | 49% / 51% | 5.34% |
| 15.0 m (49.2 ft) | 14.6 m | 15.4 m | 73.5 cm | 49% / 51% | 3.54% |
| 20.0 m (65.6 ft) | 19.4 m | 20.7 m | 1.31 m | 48% / 52% | 2.65% |
| 30.0 m (98.4 ft) | 28.6 m | 31.6 m | 2.96 m | 48% / 52% | 1.76% |
| 50.0 m (164 ft) | 46.2 m | 54.5 m | 8.26 m | 46% / 54% | 1.06% |
| 100 m (328 ft) | 85.9 m | 120 m | 33.8 m | 42% / 58% | 0.53% |
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 Micro Four Thirds is a natural choice for portraits and subject isolation. Focused at 3 m you get 2.8 cm of sharp zone; for maximum front-to-back sharpness focus at 608 m and everything from 304 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 Micro Four Thirds, focused at 3 m, it is 2.8 cm; at 1 m it is 0.3 cm.
What is the hyperfocal distance for 135mm f/2?
608 m (1994 ft) on Micro Four Thirds. Everything from 304 m to infinity is acceptably sharp.
Last updated October 03, 2026 · How we calculate · Sources