Lee half-strength CTO filter — reduces daylight from 5600K to approximately 4300K for moderate color temperature correction.
Definition
The Lee 205 is a conversion filter from the Lee Filters product line. This orange filter converts daylight (5600K) to tungsten light (3200K).
Practical Application
This lighting element is used in various professional scenarios:
- Color Correction: Matching window light to a tungsten lighting setup
- Light Control: Mounted in front of daylight lamps to adapt to warm room lighting
- Effect Creation: Generating warm lighting moods with HMI lights
- Efficiency Improvement: Avoiding complex color correction in post-production
Technical Details
Important technical features include:
- Color Temperature Conversion: 5600K to 3200K
- Light Loss: approx. 2/3 stops
- Available as sheets, rolls, or custom-cut gels
- Heat resistant up to 120°C
Practical Tips
- Adjust exposure by 2/3 stops when using
- Combination with diffusion is possible
- Use a light meter with Kelvin display for precise color temperature control
- Protect from direct sunlight to prevent fading
Professional Standards
In professional film and television production, conversion filters enable:
- Uniform color temperature with mixed light sources
- Quick set adjustments without changing lamps
- Cost reduction by utilizing existing daylight lamps
- Workflow optimization between camera and lighting departments
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