Lens planner
Depth of field on the ARRI Alexa Mini LF
Depth of field, angle of view and shot sizes for the ARRI Alexa Mini LF, computed for its Large Format 4.5K sensor. The planner below is set to this camera — change lens, stop and distance for your shot.
- acceptably sharp
- focus plane
- horizontal field of view
- Near limit
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- Far limit
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- Depth of field
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- In front / behind
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- Hyperfocal distance
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- Shot size
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| Lens | Near | Far | Depth | H. FoV | Shot size |
|---|
A 1.80 m person at the focus distance, eyes on the upper third. Grey floor = below their feet.
- Horizontal angle
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- Vertical angle
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- Diagonal angle
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- Frame width at distance
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- Frame height at distance
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- Full-frame equivalent
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Uses the focus distance on the left as the space you have between camera and subject.
| Lens | Distance for this shot size | Depth there | At your distance |
|---|
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The ARRI Alexa Mini LF sensor in numbers
Large Format 4.5K: 36.70 × 25.54 mm, diagonal 44.7 mm. The tables below use a circle of confusion of 0.037 mm (sensor width ÷ 1000) and a 16:9 image taken from the full sensor width, 36.70 × 20.62 mm. A 50 mm lens frames like a 49 mm lens on full frame (factor 0.98).
Lens sets from our list that cover the full 44.7 mm diagonal: ARRI Signature Prime, Zeiss Supreme Prime. Super 35 sets such as the ARRI/Zeiss Master Prime or ARRI/Zeiss Ultra Prime vignette in the corners unless you crop.
Up to 90 fps in the manufacturer’s spec — at high frame rates many cameras crop the sensor, which narrows the angle of view; check the recording mode and enter its active area as a custom sensor.
Depth of field on the ARRI Alexa Mini LF at T2.8
Total depth of field (near to far limit) at three working distances. Example: 50 mm at 3 m holds 2.67 m to 3.42 m.
| Focal length | at 1.5 m | at 3.0 m | at 6.0 m |
|---|---|---|---|
| 18 mm | 1.83 m | 63 m | ∞ |
| 25 mm | 78 cm | 3.91 m | 623 m |
| 35 mm | 38 cm | 1.61 m | 8.12 m |
| 50 mm | 18 cm | 74 cm | 3.15 m |
| 85 mm | 6.1 cm | 25 cm | 1.03 m |
| 135 mm | 2.3 cm | 9.8 cm | 40 cm |
Field of view and shot size
What each focal length sees in 16:9 on this sensor, and what that makes of a standing person 3 m away.
| Focal length | Horizontal angle | Frame width at 3 m | Shot size at 3 m | Full-frame equivalent |
|---|---|---|---|---|
| 18 mm | 91.1° | 6.12 m | wide shot | 18 mm |
| 25 mm | 72.6° | 4.4 m | full shot | 25 mm |
| 35 mm | 55.3° | 3.15 m | full shot | 34 mm |
| 50 mm | 40.3° | 2.2 m | medium long shot | 49 mm |
| 85 mm | 24.4° | 1.3 m | medium close-up | 83 mm |
| 135 mm | 15.5° | 82 cm | medium close-up | 132 mm |
Hyperfocal distance
Focus at the hyperfocal distance and everything from half that distance to infinity is acceptably sharp. On the ARRI Alexa Mini LF at T5.6: 3.04 m for 25 mm, 12.1 m for 50 mm.
| Focal length | T2.8 | T5.6 | T11 |
|---|---|---|---|
| 18 mm | 3.15 m | 1.58 m | 81 cm |
| 25 mm | 6.06 m | 3.04 m | 1.56 m |
| 35 mm | 11.9 m | 5.95 m | 3.04 m |
| 50 mm | 24.2 m | 12.1 m | 6.19 m |
| 85 mm | 69.8 m | 35 m | 17.8 m |
| 135 mm | 176.1 m | 88.1 m | 44.9 m |
Frequently asked
What circle of confusion should I use for the ARRI Alexa Mini LF?
0.037 mm follows the cinema convention of sensor width ÷ 1000. For 4K delivery on large screens, or when you judge focus on a big monitor, ÷ 1500 (0.025 mm) is safer — the tool’s “strict” switch does that.
How much depth of field does a 50 mm at T2.8 give on the ARRI Alexa Mini LF?
At 3 m: 74 cm (2.67 m to 3.42 m). At 1.5 m it shrinks to 18 cm.