Cinematographer
KS-Perforation ist der Standard für Kamera-Negativ. Die abgerundeten Ecken schonen den Film im Transportmechanismus – wichtig für einen reibungslosen Kameralauf.
Kodak Standard perforation – the original rectangular-shaped sprocket hole format for 35mm motion picture camera negative film, optimized for camera use with rounded corners to reduce stress and tearing, as opposed to BH (Bell & Howell) perforations used for projection prints.
What is KS Perforation?
KS Perforation (Kodak Standard) is the standard perforation format for 35mm camera negative film. The rectangular holes with rounded corners are optimized for camera transport and minimize stress and damage to the film.
Basic Principle
| Aspect | Description |
|---|---|
| Name | Kodak Standard |
| Application | Camera Negative |
| Shape | Rectangular, rounded corners |
| Purpose | Gentle transport |
KS vs. BH Perforation
| Feature | KS (Kodak Standard) | BH (Bell & Howell) |
|---|---|---|
| Corners | Rounded | Square |
| Usage | Negative | Prints |
| Durability | Higher | Lower |
| Precision | Slightly lower | Higher |
Technical Specification
| Parameter | Value |
|---|---|
| Height | 1.981 mm |
| Width | 2.794 mm |
| Pitch | 4.750 mm |
| Shape | Rectangular, rounded corners |
Perforations per Frame
| Format | Perforations |
|---|---|
| 4-Perf (Standard) | 4 per frame |
| 3-Perf | 3 per frame |
| 2-Perf | 2 per frame |
| 8-Perf (VistaVision) | 8 per frame |
Advantages of KS Perforation
| Advantage | Description |
|---|---|
| Longevity | Less tearing |
| Transport | Smoother movement |
| Camera Protection | Less abrasion |
| Flexibility | For various cameras |
Film Types with KS
| Material | Perforation |
|---|---|
| Kodak Vision3 | KS Standard |
| Kodak Double-X | KS Standard |
| Fuji Eterna | KS Standard |
| Orwo | KS Standard |
Camera Compatibility
| Camera | KS Support |
|---|---|
| ARRI 35 | Standard |
| Panavision | Standard |
| Aaton | Standard |
| Mitchell | Standard |
Negative vs. Print Stock
| Type | Perforation |
|---|---|
| Camera Negative | KS |
| Intermediate | KS or BH |
| Release Print | BH |
| Archive | KS |
Historical Development
| Year | Development |
|---|---|
| 1909 | KS introduced by Kodak |
| 1923 | BH as an alternative |
| Standard | KS established for negative |
| Today | Still the standard |
BH Perforation Details
| Aspect | Description |
|---|---|
| Shape | Rectangular, sharp corners |
| Precision | Higher |
| Usage | Print stock |
| More Prone | To damage |
Why Different Perforations?
| Reason | Explanation |
|---|---|
| Camera | Film moves fast, needs tolerance |
| Projector | Film needs precision for still image |
| Lifespan | Negative rarely goes through many cycles |
| Prints | Many passes in the projector |
Film Gate and Perforation
| Component | Function |
|---|---|
| Sprocket | Engages with perforations |
| Gate | Holds film flat |
| Movement | Transports film |
| Registration | Positions image |
Super 35 and Perforation
| Aspect | Description |
|---|---|
| 4-Perf | Standard Super 35 |
| 3-Perf | More efficient use |
| KS | Standard for all |
| Image Area | More with 3-Perf |
Scanning and Perforation
| Aspect | Handling |
|---|---|
| Scanner | Perf recognition |
| Registration | Perf as reference |
| Stabilization | Possible in post |
| Quality | KS is sufficient |
Damage
| Problem | Cause |
|---|---|
| Tearing | Mechanical stress |
| Stretching | Repeated transport |
| Abrasion | Dirt |
| Shrinkage | Age |
Prevention
| Measure | Description |
|---|---|
| Clean Cameras | Regular cleaning |
| Correct Loading | Load film properly |
| Handling | Careful |
| Storage | Climate controlled |
Labs and Perforation
| Aspect | Relevance |
|---|---|
| Ordering | KS for negative |
| Printing | BH for copies |
| Scanning | Both accepted |
| Communication | Specify perf type |
Best Practices
| Practice | Reason |
|---|---|
| KS for Camera | Standard, gentle |
| Inform Lab | About perf type |
| Observe Handling | Avoid damage |
| Archiving | KS is more durable |
Today
KS perforation remains the standard for 35mm camera negative film. The rounded corners protect the film during repeated transport through the camera mechanism. Although digital capture is dominant, understanding perforation types is essential for anyone working with analog film.
From the crafts
Perspectives
Director
Perforationstypen betreffen mich indirekt – wichtig ist, dass das Material zur Kamera und zum späteren Workflow passt.
Producer
KS vs. BH ist ein technisches Detail, aber relevant bei der Materialbestellung und Lab-Kommunikation. Das richtige Format vermeidet Kompatibilitätsprobleme.
More in the lexikon
Related terms
Test your knowledge
Quiz
1. Zu welchem Department gehört „KS-Perforation / Kodak-Standard-Perforation / Negativ-Perforation"?
2. Wie viele verschiedene Fachperspektiven bietet dieser Eintrag?