LEE Filters - 202 1/2 CTB, pro rata

Enhance your lighting setup with the LEE Filters 202 1/2 CTB, a meticulously engineered colour correction gel designed to precisely balance the colour temperature of various light sources. This premium filter is an indispensable tool for professional cinematographers, photographers, and gaffers who demand exacting control over their light, ensuring consistent and natural-looking results across a wide range of shooting environments. Crafted to deliver superior performance and durability, the 1/2 CTB effectively converts tungsten light sources to a cooler daylight appearance, allowing for seamless integration with natural light or other daylight-balanced fixtures without compromising light output or colour fidelity. Its reliable colour transformation makes it a cornerstone accessory for achieving pristine colour rendition in both studio and on-location productions.

TECHNICAL SPECIFICATIONS AND COLOR CORRECTION

The LEE Filters 202 1/2 CTB (Colour Temperature Blue) is specifically designed to adjust the colour temperature of tungsten or other warm light sources. This particular grade, the "1/2 CTB," indicates that it provides half the strength of a full CTB filter, offering a moderate shift towards blue.
Colour Temperature Shift: Converts approximately 3200K (tungsten) light to around 4100-4300K, bringing it closer to daylight (approx. 5600K).
Transmission: Generally high light transmission, ensuring minimal light loss while providing effective colour conversion. Exact transmission values can vary slightly but are typically within acceptable professional ranges for colour correction.
Effect: Ideal for situations where a full CTB is too strong, or when subtly cooling down warm light sources to match cooler ambient light conditions, often used to match tungsten fixtures with early morning, late afternoon, or heavily overcast daylight.

MATERIAL AND DURABILITY

LEE Filters are renowned for their quality and resilience, and the 202 1/2 CTB is no exception. This filter is manufactured from a robust, heat-resistant polyester material, ensuring longevity and consistent performance under the demanding conditions of professional film and photographic sets.
Heat Resistance: Designed to withstand the high temperatures emitted by professional lighting fixtures without melting, burning, or significantly altering its colour properties over time.
Durability: Resistant to tearing and creasing during handling and rigging, making it a reliable choice for repeated use. The material maintains its optical clarity and colour consistency through numerous applications.
Fade Resistance: Formulated to resist colour fading, ensuring that the filter maintains its specified colour correction properties over its lifespan, which is crucial for maintaining shot-to-shot consistency in long-term projects.

VERSATILITY AND APPLICATION

The LEE Filters 202 1/2 CTB is a highly versatile tool, suitable for a multitude of lighting scenarios in both still photography and motion picture production. Its precise colour correction capabilities make it invaluable for achieving specific aesthetic goals.
Daylight Matching: Primarily used to balance tungsten light sources to blend more harmoniously with natural daylight, or to introduce a subtle cool tone.
Mixed Lighting Environments: Essential when working with a combination of artificial and natural light, allowing the gaffer to fine-tune each light source's colour temperature for a cohesive look.
Creative Colouring: Can also be used creatively to introduce a slight blue cast to scenes, evoking a cooler mood or mimicking specific times of day or weather conditions.
Fixture Compatibility: Compatible with a wide range of lighting fixtures, including Fresnels, open-face units, LED panels (when balancing existing warm bias), and practical lights, making it a staple in any lighting kit.

OPTICAL PERFORMANCE

The optical quality of the LEE Filters 202 1/2 CTB is paramount to its professional application. LEE Filters are known for producing gels that do not introduce unwanted aberrations or reduce overall image quality.
Clarity: The filter material is engineered to be optically clear, ensuring that it does not degrade the sharpness or resolution of the light passing through it.
Colour Accuracy: Provides a consistent and predictable colour shift, allowing lighting professionals to achieve precise colour matching without guesswork. The manufacturing process ensures batch-to-batch consistency in colour and transmission.
Evenness: The colour is evenly distributed throughout the filter, preventing hot spots or uneven colour casts when light passes through it, which is critical for smooth light distribution.

CLASSIFICATION

The LEE Filters 202 1/2 CTB is classified as a professional-grade colour temperature blue (CTB) correction gel, specifically falling into the subcategory of "half" strength filters. It serves as a crucial component within the broader category of lighting filters and gels, which are essential tools for manipulating light quality, quantity, and colour on film sets, photography studios, and theatrical productions. This particular filter is part of LEE Filters' extensive range of colour correction products, which are universally respected in the industry for their reliability and precision. As a correction filter, its primary function is not to add an artistic colour but rather to adjust the spectral output of a light source to a desired colour temperature, most commonly to convert warmer lights to a cooler, daylight-like appearance. Its 1/2 CTB designation positions it as a moderate correction tool, offering a less aggressive blue shift than a full CTB, making it ideal for nuanced adjustments or for situations where a full conversion would be too powerful. This makes it an indispensable item in a gaffer's toolkit, frequently used for balancing ambient light, matching dissimilar fixtures, or creating a specific colour temperature environment.