f/29
Aperture
9.7
Stops less light than f/1
0.12%
Light vs f/1
∞
DoF: 50 mm at 3 m (FF)
38.9 µm
Airy disk diameter
Depth of field at f/29 (full frame)#
| Focal | at 1 m | at 2 m | at 5 m | at 10 m | Hyperfocal |
|---|---|---|---|---|---|
| 16 mm | ∞ | ∞ | ∞ | ∞ | 31.0 cm |
| 24 mm | ∞ | ∞ | ∞ | ∞ | 68.6 cm |
| 35 mm | 2.58 m | ∞ | ∞ | ∞ | 1.44 m |
| 50 mm | 74.2 cm | 5.03 m | ∞ | ∞ | 2.92 m |
| 85 mm | 22.3 cm | 97.4 cm | 9.11 m | ∞ | 8.39 m |
| 135 mm | 8.3 cm | 35.9 cm | 2.45 m | 12.1 m | 21.1 m |
| 200 mm | 3.5 cm | 15.7 cm | 1.06 m | 4.47 m | 46.2 m |
Diffraction at f/29#
Diffraction softening becomes visible at 100% once the Airy disk spans more than about two pixels. It is a gradual effect, not a cliff.
| Sensor | Pixel pitch | Airy disk / pixel | Pixel-level sharpness |
|---|---|---|---|
| Full frame 24 MP | 6.00 µm | 6.5× | diffraction-limited |
| Full frame 45 MP | 4.39 µm | 8.9× | diffraction-limited |
| Full frame 61 MP | 3.79 µm | 10.3× | diffraction-limited |
| APS-C 24 MP | 3.92 µm | 9.9× | diffraction-limited |
| APS-C 40 MP | 3.04 µm | 12.8× | diffraction-limited |
| Micro Four Thirds 20 MP | 3.34 µm | 11.7× | diffraction-limited |
| 1-inch 20 MP | 2.41 µm | 16.1× | diffraction-limited |
| Smartphone 1/1.3" 50 MP | 1.17 µm | 33.2× | diffraction-limited |
f/29 on smaller sensors equals…#
Exposure (brightness) is the same at a given f-number on every format; equivalence describes depth of field and total light.
| Used on | Full-frame equivalent depth of field |
|---|---|
| APS-C (1.5×) | f/43.5 |
| Canon APS-C (1.6×) | f/46.4 |
| Micro Four Thirds (2×) | f/58.0 |
| 1-inch (2.7×) | f/78.3 |
Shutter speed at f/29#
| Light | ISO 100 | ISO 400 | ISO 1600 | ISO 6400 |
|---|---|---|---|---|
| EV 15 · Bright sun, distinct shadows (Sunny 16) | 1/40 s | 1/160 s | 1/640 s | 1/2500 s |
| EV 13 · Cloudy-bright, no shadows | 1/10 s | 1/40 s | 1/160 s | 1/640 s |
| EV 12 · Heavy overcast / open shade | 1/5 s | 1/20 s | 1/80 s | 1/320 s |
| EV 10 · Just after sunset | 0.8 s | 1/5 s | 1/20 s | 1/80 s |
| EV 8 · Bright interior, city street at night | 3.2 s | 0.8 s | 1/5 s | 1/20 s |
| EV 5 · Home interior at night | 25 s | 6 s | 1.6 s | 0.4 s |
| EV 2 · Distant city lights | 4 min | 1 min | 13 s | 3.2 s |
| EV -2 · Moonlit landscape | > 4 min | > 4 min | 4 min | 1 min |
When to use f/29#
f/29 is a go-to setting for maximum depth of field (macro, focus-free landscapes) and long exposures in daylight, at the cost of diffraction softness.
Other apertures#
Frequently asked questions#
Is f/29 a wide aperture?
No — f/29 is a small (narrow) aperture. Smaller numbers mean larger openings.
How much light does f/29 let in compared to f/2.8?
0.01× (-6.7 stops).
Last updated October 03, 2026 · How we calculate · Sources