Depth of field: Blackmagic Pocket Cinema 6K Pro
The Blackmagic Pocket Cinema 6K Pro uses a Super 35 6K sensor at 23.1 × 12.99 mm — which fixes the circle of confusion at 0.023 mm, and from that every depth-of-field number on this page. Example: 50 mm at T2.8 focused at 2 m gives 0.20 m of usable depth (1.90 m to 2.11 m). The calculator above is preset to the Blackmagic Pocket Cinema 6K Pro.
Depth of Field Calculator
- Near limit
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- Far limit
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- Total depth
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- Hyperfocal
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- FoV / frame width
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Circle of confusion per camera derives from sensor width (d/1000 convention). Camera list: nominal manufacturer specs.
Hyperfocal distance on the Blackmagic Pocket Cinema 6K Pro
Focused at the hyperfocal distance, sharpness runs from half that distance to infinity — the one number that matters for landscapes, establishers and any shot without a focus puller.
| Focal length | T1.4 | T2 | T2.8 | T4 | T5.6 |
|---|---|---|---|---|---|
| 18 mm | 10.1 | 7.1 | 5.0 | 3.5 | 2.5 |
| 25 mm | 19.4 | 13.6 | 9.7 | 6.8 | 4.9 |
| 35 mm | 38.1 | 26.7 | 19.1 | 13.4 | 9.5 |
| 50 mm | 77.7 | 54.4 | 38.9 | 27.2 | 19.5 |
| 85 mm | 224.5 | 157.2 | 112.3 | 78.6 | 56.2 |
Depth of field at interview distance (2 m)
The interview question in numbers: how much room does the subject have in front of the Blackmagic Pocket Cinema 6K Pro before drifting out of focus?
| Focal length | T1.4 | T2 | T2.8 | T4 | T5.6 |
|---|---|---|---|---|---|
| 35 mm | 0.21 m | 0.30 m | 0.42 m | 0.60 m | 0.86 m |
| 50 mm | 0.10 m | 0.14 m | 0.20 m | 0.29 m | 0.41 m |
| 85 mm | 0.03 m | 0.05 m | 0.07 m | 0.10 m | 0.14 m |
Working with it on set
Recording at 6144 × 3456, large-screen 4K delivery judges focus more harshly than the table: for critical work, halve the circle of confusion mentally — the 0.20 m at 50 mm/T2.8/2 m becomes half that. The table follows the classical cinema convention.
In pre-production the number belongs in the shot list: a shot planned at T1.4 on 85 mm needs a focus puller and time — both of which belong in the schedule before they are missing on set.
Frequently asked
What circle of confusion does the Blackmagic Pocket Cinema 6K Pro use?
0.023 mm — following the usual sensor-width ÷ 1000 convention (23.1 mm ÷ 1000, rounded). Every table on this page uses it.
Do the numbers hold for any lens?
Yes — depth of field depends on focal length, stop, distance and sensor, not the lens model. What differs between lenses is bokeh (how the blur looks), not where it starts.