Fujifilm X-T5 Diffraction Limit
With a 720 nm infrared filter, the Fujifilm X-T5 stays free of visible diffraction up to ƒ/3.6, and diffraction starts to soften images at ƒ/6.3. Unconverted (hot mirror), it is diffraction-free up to ƒ/5 and soft from ƒ/8. These limits come from its 3.04 μm pixel pitch: longer infrared wavelengths make a larger Airy disk, so diffraction appears at wider apertures than in visible light.
Open the Fujifilm X-T5 in the calculator
Fujifilm X-T5 specifications
- Pixel pitch: 3.04 μm
- Megapixels: 40.2
- Pixels: 7728 × 5152
- Sensor: APS-C, 23.5 × 15.7 mm
Buy the Fujifilm X-T5: KEH Adorama B&H
Sharpest ƒ-stop by filter
Safe is the narrowest aperture with a diffraction ratio of 3 or lower at every wavelength the filter passes. Caution allows up to 3.75. Avoid is the first aperture where any wavelength reaches 4.5. All three are calculated to the one-third stop. See which wavelengths each filter passes.
| Filter | Safe | Caution | Avoid |
|---|---|---|---|
| Full spectrum | ƒ/3.6 | ƒ/4.5 | ƒ/6.3 |
| Hot mirror or UV/IR cut | ƒ/5 | ƒ/6.3 | ƒ/8 |
| 470 nm high-pass | ƒ/3.6 | ƒ/4.5 | ƒ/6.3 |
| 550 nm high-pass | ƒ/3.6 | ƒ/4.5 | ƒ/6.3 |
| 590 nm high-pass | ƒ/3.6 | ƒ/4.5 | ƒ/6.3 |
| 665 nm high-pass | ƒ/3.6 | ƒ/4.5 | ƒ/6.3 |
| 720 nm high-pass | ƒ/3.6 | ƒ/4.5 | ƒ/6.3 |
| 780 nm high-pass | ƒ/3.6 | ƒ/4.5 | ƒ/6.3 |
| 830 nm high-pass | ƒ/3.6 | ƒ/4.5 | ƒ/6.3 |
| 930 nm high-pass | ƒ/3.6 | ƒ/4.5 | ƒ/6.3 |
| 1000 nm high-pass | ƒ/3.6 | ƒ/4.5 | ƒ/6.3 |
| IR Chrome | ƒ/3.6 | ƒ/4.5 | ƒ/6.3 |
| UV Bandpass | ƒ/9 | ƒ/11 | ƒ/14.3 |
Diffraction ratio at each ƒ-stop
The Airy disk diameter divided by the 3.04 μm pixel pitch, for every wavelength from ultraviolet to infrared. A filter only passes some of these wavelengths; the table above applies each filter’s set. How the ratio is calculated.
| ƒ-stop | 350 nm | 400 nm | 470 nm | 550 nm | 590 nm | 665 nm | 720 nm | 780 nm | 830 nm | 930 nm | 1000 nm |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ƒ/1.4 | 0.39 | 0.45 | 0.53 | 0.62 | 0.66 | 0.75 | 0.81 | 0.88 | 0.93 | 1.05 | 1.12 |
| ƒ/2 | 0.56 | 0.64 | 0.75 | 0.88 | 0.95 | 1.07 | 1.16 | 1.25 | 1.33 | 1.49 | 1.61 |
| ƒ/2.8 | 0.79 | 0.9 | 1.06 | 1.24 | 1.33 | 1.49 | 1.62 | 1.75 | 1.87 | 2.09 | 2.25 |
| ƒ/4 | 1.12 | 1.28 | 1.51 | 1.77 | 1.89 | 2.13 | 2.31 | 2.5 | 2.66 | 2.99 | 3.21 |
| ƒ/5.6 | 1.57 | 1.8 | 2.11 | 2.47 | 2.65 | 2.99 | 3.24 | 3.51 | 3.73 | 4.18 | 4.49 |
| ƒ/8 | 2.25 | 2.57 | 3.02 | 3.53 | 3.79 | 4.27 | 4.62 | 5.01 | 5.33 | 5.97 | 6.42 |
| ƒ/11 | 3.09 | 3.53 | 4.15 | 4.86 | 5.21 | 5.87 | 6.36 | 6.89 | 7.33 | 8.21 | 8.83 |
| ƒ/16 | 4.49 | 5.14 | 6.04 | 7.06 | 7.58 | 8.54 | 9.25 | 10.02 | 10.66 | 11.94 | 12.84 |
| ƒ/22 | 6.18 | 7.06 | 8.3 | 9.71 | 10.42 | 11.74 | 12.71 | 13.77 | 14.66 | 16.42 | 17.66 |
| ƒ/32 | 8.99 | 10.27 | 12.07 | 14.13 | 15.15 | 17.08 | 18.49 | 20.03 | 21.32 | 23.89 | 25.68 |
| No visible diffraction (less than 3) | |
| Visible diffraction may slightly impact image sharpness (3 to 4.5) | |
| Visible diffraction will impact image sharpness (4.5 or greater) |
Cameras with similar pixel pitch
Other APS-C cameras within 0.2 μm of the Fujifilm X-T5. The same pixel pitch gives the same diffraction limits.
- Fujifilm X-E5 (3.04 μm)
- Fujifilm X-H2 (3.04 μm)
- Fujifilm X-T50 (3.04 μm)
- Fujifilm X100VI (3.04 μm)
- Canon EOS 90D (3.20 μm)
- Canon EOS M6 Mark II (3.20 μm)
Pixel pitch comes from the camera database. Send a correction if anything here is wrong.