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Filmmaking Dictionary: Number 1 / 1.85:1 Aspect Ratio
Definition
1.85:1 is a theatrical widescreen aspect ratio with a picture 1.85 times as wide as it is high. It is commonly associated with the digital-cinema Flat presentation format and many feature films.
The number specifies the picture shape. It does not mean the film was shot on a particular sensor, film gauge or type of lens. Different acquisition formats can supply an image intended for a 1.85:1 release.
How It Differs From 16:9
A 16:9 frame is approximately 1.78:1, making it slightly taller at the same width. Preserving a 1.85:1 picture inside a 16:9 video file normally leaves small bars at the top and bottom.
Removing those bars by filling the screen changes the composition unless extra image area was captured and approved for that version. Stretching the picture to fit changes proportions. Neither should happen accidentally during export or playback.
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The Digital-Cinema Frame
A common 2K Flat image area is 1998 × 1080 pixels; the corresponding 4K area is 3996 × 2160. Both produce a 1.85:1 ratio. Those figures should not be confused with the full 2048 × 1080 or 4096 × 2160 digital-cinema rasters.
The finishing specification determines how the intended picture is packaged. A file can contain unused borders or a smaller active image, so its outer dimensions alone do not always reveal the creative aspect ratio.
Framing on Set
Use approved 1.85:1 frame lines when choosing camera height, lens and blocking. If the camera records beyond those lines, decide how that additional area may be used. It can help with stabilisation or alternate framing, but unwanted equipment outside the intended frame may become visible in another extraction.
For a close-up, even the relatively small difference between 16:9 and 1.85:1 can alter the space above a head or below a hand. Check the actual frame rather than assuming that a near match is good enough.
Delivery Checks
- Confirm the intended active picture ratio with editorial and finishing.
- Distinguish the camera raster from the release image area.
- Check titles and subtitles inside the approved picture boundary.
- Review a test export on the intended playback system.
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Frequently Asked Questions
Does 1.85:1 require an anamorphic lens?
No. Spherical capture is common, and aspect ratio alone does not identify the lens system.
Is Flat the same as an ungraded image?
No. In digital-cinema packaging, Flat identifies a presentation format. A flat-looking image describes something different.
Related Terms
- Aspect Ratio
- 1.78:1 (16:9 Aspect Ratio)
- 1.66:1 European Widescreen
- 1.90:1 (IMAX Digital Aspect Ratio)
- Delivery
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