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Filmmaking Dictionary: Number 2 / 2K Resolution
Definition
2K describes an image with approximately two thousand pixels across its width. In digital cinema, the familiar full container is 2,048 × 1,080 pixels. The active picture dimensions can differ with the presentation format.
The label is not precise enough to specify a complete camera setting or delivery file. Always include the actual width, height, frame rate and other required format details.
Common Dimensions
- DCI 2K container: 2,048 × 1,080.
- DCI 2K flat picture: 1,998 × 1,080, approximately 1.85:1.
- DCI 2K scope picture: 2,048 × 858, approximately 2.39:1.
- Full HD: 1,920 × 1,080, a different raster.
- QHD: 2,560 × 1,440; sometimes marketed as ‘2K’ in consumer contexts, which makes the exact dimensions especially important.
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Recording Resolution Versus Image Quality
A 2K recording can come from a larger sensor readout that is reduced in size, or from a smaller sensor region. Those methods may produce different framing and detail even when the output file has the same dimensions.
The pixel count also does not tell you the bit depth, colour sampling, compression, dynamic range or quality of the lens and focus. A well-exposed, carefully processed 2K image can be more useful than a poorly captured larger file.
Practical Workflow Example
An editor receives a 2,048 × 1,080 camera file but needs a 1,920 × 1,080 master. Fitting the whole source width reduces its height and introduces space above and below; filling the delivery frame at the original height requires a horizontal crop. The correct choice depends on the intended composition, not on both files being casually called ‘HD’ or ‘2K’.
Agree on the active picture before shooting graphics, titles or effects plates. A small mismatch in framing can become visible when several departments produce material using different assumptions.
Checks Before Delivery
- Read the specified raster instead of relying on the ‘2K’ label.
- Confirm whether black bars belong inside the file.
- Check the expected pixel aspect ratio and image proportions.
- Verify codec, frame rate and colour requirements separately.
- Inspect the final export rather than assuming the sequence settings describe the delivered file.
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Frequently Asked Questions
Is 2K exactly the same as 1080p?
No. 1080p identifies progressive video with 1,080 lines, commonly at 1,920 pixels wide. Cinema 2K commonly uses a 2,048-pixel-wide container.
Does 2K mean a 2,000-watt light?
Only in lighting shorthand. Context distinguishes image resolution from a 2K fixture.
Related Terms
Browse all terms starting with 2 or return to the filmmaking dictionary.