Specifications#
- Brand
- ARRI
- Model
- Alexa Mini
- Camera type
- Large-sensor compact
- Sensor size
- 28.2 × 18.8 mm (APS-H)
- Crop factor
- 1.27×
Specifications merged from Wikidata and openMVG. Spot an error? Tell us.
Sensor size compared#
Focal length equivalents & field of view#
Multiply any focal length by 1.27 to get the full-frame field of view. For fixed-lens cameras use the real focal length printed on the lens (e.g. “6.1–18.3 mm”), not the 35 mm equivalent.
| Lens on this camera | Full-frame equivalent | Horizontal | Vertical | Diagonal |
|---|---|---|---|---|
| 8 mm | 10 mm | 120.9° | 99.3° | 129.5° |
| 10 mm | 13 mm | 109.4° | 86.5° | 119.0° |
| 12 mm | 15 mm | 99.3° | 76.2° | 109.5° |
| 14 mm | 18 mm | 90.5° | 67.8° | 101.0° |
| 16 mm | 20 mm | 82.9° | 60.9° | 93.4° |
| 18 mm | 23 mm | 76.2° | 55.2° | 86.6° |
| 20 mm | 25 mm | 70.5° | 50.4° | 80.6° |
| 24 mm | 31 mm | 61.0° | 42.8° | 70.5° |
| 28 mm | 36 mm | 53.5° | 37.2° | 62.5° |
| 35 mm | 45 mm | 44.0° | 30.1° | 51.7° |
| 40 mm | 51 mm | 38.9° | 26.5° | 46.0° |
| 50 mm | 64 mm | 31.5° | 21.3° | 37.5° |
| 56 mm | 71 mm | 28.3° | 19.1° | 33.7° |
| 70 mm | 89 mm | 22.8° | 15.3° | 27.3° |
| 85 mm | 108 mm | 18.9° | 12.6° | 22.6° |
| 100 mm | 127 mm | 16.1° | 10.8° | 19.3° |
| 135 mm | 172 mm | 11.9° | 8.0° | 14.3° |
| 200 mm | 255 mm | 8.1° | 5.4° | 9.7° |
| 300 mm | 382 mm | 5.4° | 3.6° | 6.5° |
| 400 mm | 510 mm | 4.0° | 2.7° | 4.9° |
| 600 mm | 765 mm | 2.7° | 1.8° | 3.2° |
| 800 mm | 1020 mm | 2.0° | 1.3° | 2.4° |
Depth of field table#
Total depth of field at each subject distance, using a circle of confusion of 23.5 µm (the 0.030 mm full-frame standard scaled by the crop factor).
| Focal | Aperture | 50.0 cm | 1.00 m | 2.00 m | 3.00 m | 5.00 m | 10.0 m | Hyperfocal |
|---|---|---|---|---|---|---|---|---|
| 17 mm | f/1.8 | 7.1 cm | 29.4 cm | 1.27 m | 3.24 m | 15.7 m | ∞ | 6.84 m |
| 17 mm | f/2.8 | 11.2 cm | 47.2 cm | 2.27 m | 7.60 m | ∞ | ∞ | 4.40 m |
| 17 mm | f/4 | 16.1 cm | 71.4 cm | 4.44 m | 105 m | ∞ | ∞ | 3.09 m |
| 17 mm | f/8 | 34.9 cm | 2.17 m | ∞ | ∞ | ∞ | ∞ | 1.55 m |
| 34 mm | f/1.8 | 1.7 cm | 7.1 cm | 29.0 cm | 66.0 cm | 1.88 m | 8.43 m | 27.3 m |
| 34 mm | f/2.8 | 2.7 cm | 11.0 cm | 45.4 cm | 1.04 m | 3.08 m | 16.8 m | 17.6 m |
| 34 mm | f/4 | 3.8 cm | 15.8 cm | 65.7 cm | 1.54 m | 4.84 m | 47.6 m | 12.3 m |
| 34 mm | f/8 | 7.6 cm | 32.3 cm | 1.43 m | 3.78 m | 23.4 m | ∞ | 6.17 m |
| 58 mm | f/1.8 | 0.6 cm | 2.4 cm | 9.8 cm | 22.3 cm | 62.5 cm | 2.54 m | 79.4 m |
| 58 mm | f/2.8 | 0.9 cm | 3.7 cm | 15.2 cm | 34.7 cm | 97.7 cm | 4.05 m | 51.1 m |
| 58 mm | f/4 | 1.2 cm | 5.3 cm | 21.8 cm | 49.7 cm | 1.41 m | 6.03 m | 35.8 m |
| 58 mm | f/8 | 2.5 cm | 10.6 cm | 44.0 cm | 1.02 m | 3.00 m | 16.1 m | 17.9 m |
| 95 mm | f/1.8 | 0.2 cm | 0.8 cm | 3.6 cm | 8.2 cm | 23.0 cm | 93.2 cm | 213 m |
| 95 mm | f/2.8 | 0.3 cm | 1.3 cm | 5.6 cm | 12.7 cm | 35.9 cm | 1.45 m | 137 m |
| 95 mm | f/4 | 0.4 cm | 1.9 cm | 8.0 cm | 18.2 cm | 51.3 cm | 2.09 m | 95.9 m |
| 95 mm | f/8 | 0.8 cm | 3.8 cm | 15.9 cm | 36.5 cm | 1.03 m | 4.32 m | 48.0 m |
Equivalent aperture#
Exposure is identical at the same f-number on any format; equivalence only describes depth of field and total light.
Night-sky exposure limits#
Longest exposure before stars trail. The NPF rule accounts for pixel pitch and is stricter than the classic 500 rule — use it for pin-sharp stars on high-resolution sensors. (NPF needs a known resolution and is omitted here.)
| Focal length | 500 rule |
|---|---|
| 11 mm (14 mm eq.) | 35.7 s |
| 16 mm (20 mm eq.) | 24.5 s |
| 19 mm (24 mm eq.) | 20.6 s |
| 27 mm (34 mm eq.) | 14.5 s |
| 39 mm (50 mm eq.) | 10.1 s |
Handheld shutter speed guide#
The reciprocal rule uses the equivalent focal length. High-resolution sensors may need one stop faster than this for pixel-sharp results.
| Focal length | No stabilisation (1/equiv. focal) | With 3-stop IS | With 5-stop IBIS |
|---|---|---|---|
| 19 mm | 1/25 s | 0.3 s | 1.3 s |
| 39 mm | 1/50 s | 1/6 s | 0.6 s |
| 78 mm | 1/100 s | 1/13 s | 0.3 s |
| 157 mm | 1/200 s | 1/25 s | 1/6 s |
Lens#
The ARRI Alexa Mini has a built-in, non-interchangeable lens. Use the real focal length of that lens with the tables above; its full-frame equivalent is that number × 1.27.
Similar cameras#
Other APS-H cameras from around the same time.
Frequently asked questions#
What is the crop factor of the ARRI Alexa Mini?
The ARRI Alexa Mini has a crop factor of 1.27× relative to 35 mm full frame (diagonal 34.0 mm vs 43.3 mm).
What size is the ARRI Alexa Mini sensor?
28.2 × 18.8 mm (APS-H), an area of 532 mm² — 62% of full frame.
Is the ARRI Alexa Mini full frame?
No — its sensor is APS-H, which is 1.6× smaller in area than full frame.
How long can I expose the night sky with the ARRI Alexa Mini?
With a 16 mm lens (20 mm equivalent) the 500 rule gives 25 s.
Sources & licences#
- Wikidata Q123110856 — CC0
- openMVG sensor width database — MPL-2.0
Last updated October 03, 2026 · How we calculate · Sources