Standard widescreen aspect ratio of 1.85:1 used primarily in US theatrical releases – achieved by masking 35mm film without anamorphic lenses, positioned between Academy (1.37:1) and Scope (2.39:1), offering a balanced cinematic frame.
What is Flat?
Flat refers to the aspect ratio 1.85:1 – the standard widescreen format for US theatrical productions. It is achieved by vertically masking 35mm film without using anamorphic lenses.
Basic Data
| Element | Value |
|---|---|
| Ratio | 1.85:1 |
| Origin | USA, 1950s |
| Alternative | European Flat 1.66:1 |
| Optics | Spherical |
Aspect Ratio Comparison
| Format | Ratio | Characteristic |
|---|---|---|
| Academy | 1.37:1 | Classic, nearly square |
| Flat | 1.85:1 | Standard widescreen |
| Scope | 2.39:1 | Ultra-wide, epic |
| IMAX | 1.43:1 | Imposing, vertical |
Technical Implementation
| Method | Description |
|---|---|
| Hard Matte | Masked in camera |
| Soft Matte | Full frame, cropped later |
| Extraction | From a larger negative |
| Native | Designed digitally |
Hard Matte vs. Soft Matte
| Aspect | Hard Matte | Soft Matte |
|---|---|---|
| Recording | Masked | Full frame |
| Negative | Only 1.85:1 | More information |
| Flexibility | Low | High |
| Framing | Definitive | Adjustable |
Film Resolution in Flat
| Element | Description |
|---|---|
| 35mm 4-Perf | Full gate |
| Flat Extraction | Vertical crop |
| Usable Area | Approx. 21mm × 11.3mm |
| Quality | High |
Digital Cinema in Flat
| Standard | Resolution |
|---|---|
| 2K Flat | 1998 × 1080 |
| 4K Flat | 3996 × 2160 |
| Container | DCP |
| Projection | Flat lens |
Flat vs. Scope
| Aspect | Flat (1.85:1) | Scope (2.39:1) |
|---|---|---|
| Optics | Spherical | Anamorphic |
| Vertical | More | Less |
| Horizontal | Less | More |
| Intimacy | Higher | Lower |
When to Use Flat?
| Genre/Style | Reason |
|---|---|
| Drama | Intimacy |
| Comedy | Classic |
| Horror | Vertical space |
| Dialogue-heavy | Close-ups |
When to Use Scope?
| Genre/Style | Reason |
|---|---|
| Epics | Vastness |
| Action | Horizontal movement |
| Westerns | Landscapes |
| Sci-Fi | Scope = Future |
Projection
| Element | Flat |
|---|---|
| Lens | Standard |
| Masking | Top/Bottom |
| Brightness | Good |
| Compatibility | Universal |
Home Video with Flat
| Format | Handling |
|---|---|
| 16:9 TV | Minimal bars |
| Blu-ray | Slight letterboxing |
| Streaming | Close to native |
| Smartphone | Well usable |
IMAX Compatibility
| Aspect | Description |
|---|---|
| Open Matte | Expandable |
| IMAX Ratio | 1.43:1 or 1.90:1 |
| Dual Format | Flat + IMAX |
| Planning | Consider framing |
Historical Context
| Year | Development |
|---|---|
| 1932 | Academy 1.37:1 |
| 1953 | CinemaScope (Scope) |
| 1954 | Flat 1.85:1 introduced |
| Today | Digital standard |
Regional Differences
| Region | Standard |
|---|---|
| USA | 1.85:1 |
| Europe | 1.66:1 (historically) |
| UK | 1.85:1 (today) |
| International | 1.85:1 dominant |
Sensor Usage
| Camera | With Flat |
|---|---|
| ARRI Alexa | Native Mode |
| RED | Full width |
| Sony Venice | Full Frame |
| 35mm Film | Cropped Vertical |
Framing Considerations
| Element | Flat |
|---|---|
| Headroom | Important |
| Vertical | More room |
| Two-shot | Comfortable |
| Wide shot | Less extreme |
Notable Flat Films
| Film | Director |
|---|---|
| The Godfather | Francis Ford Coppola |
| Taxi Driver | Martin Scorsese |
| A Clockwork Orange | Stanley Kubrick |
| Get Out | Jordan Peele |
Best Practices
| Practice | Reason |
|---|---|
| Choose format early | Framing decisions |
| Consider extraction | Home video |
| Communicate | Inform the team |
| Stay consistent | Stylistically |
Today
Flat remains the workhorse of cinema – less striking than Scope, but versatile and ideal for many stories. The balance between cinematic width and practical verticality makes 1.85:1 a safe choice for filmmakers aiming to reach a broad audience.
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