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Rosco 4332269986 Roscolux Blue Diffusion Sheet

Rosco Roscolux Blue Diffusion sheet softens and spreads light with just 8% transmission for dramatic, even illumination.

$16.00*
✓ In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Rosco Roscolux Blue Diffusion sheet is a dual-purpose lighting filter that simultaneously softens hard light sources and introduces a cool blue tone. At 20x24 inches, the sheet provides ample material to cut custom pieces for standard gel frames, barn door slots, or DIY lighting modifiers. It is widely used across photography studios, film sets, and theatrical stages wherever a controlled, even wash of cool-toned light is needed.

With a transmission rate of just 8%, this is a heavy diffusion material that dramatically reduces light output while scattering the beam broadly. This makes it especially useful for taming harsh spotlights or creating gentle fill light without the need to stack separate diffusion and color correction gels. The Roscolux line is an industry standard known for consistent color accuracy and reliable performance under professional lighting conditions.

Key Features

ENHANCED COLOR ACCURACY - Roscolux 121 Blue Diffusion Filter ensures true-to-life color representation, maintaining the integrity of your lighting design for professional results.

SUPERIOR LIGHT TRANSMISSION - Experience minimal light loss with this filter, preserving your light's intensity while achieving the desired diffusion effect, optimizing your setup.

INCREASED DURABILITY - Crafted for longevity, the Roscolux filter withstands frequent use and handling, ensuring a reliable and consistent performance throughout its lifespan.

OPTIMIZED HEAT RESISTANCE - Designed to endure high temperatures from studio lights, preventing warping or color degradation, maintaining consistent light quality during extended shoots.

CONVENIENT SIZE AND SHAPE - The 20x24" sheet offers ample coverage for various lighting fixtures, easily cut and shaped to fit your specific needs, enhancing versatility.

SIMPLE AND EASY TO USE - Quickly apply and adjust the filter to achieve desired lighting effects, streamlining your workflow and allowing for creative flexibility on set or location.

No further features available.

No further features available.

No further features available.

Specifications

Brand
Rosco
Product Line
Roscolux
Type
Blue Diffusion
Sheet Size
20 x 24 inches
Transmission
8%
Material
Light Diffusing Material
Model
4332269986

Pros & Cons

👍 Pros

  • Combines diffusion and blue color correction in a single sheet
  • Large 20x24" size allows custom cutting for different fixtures
  • Low 8% transmission provides strong light reduction without needing additional ND filters
  • Trusted Rosco Roscolux brand used widely in professional film and theater

👎 Cons

  • Single sheet format means repeat purchases for multi-fixture setups
  • 8% transmission is very heavy diffusion, which may cut too much light for some situations
  • Not heat-resistant enough for extremely high-output tungsten fixtures at close range

Frequently Asked Questions

The sheet measures 20x24 inches, which can be cut to fit various lighting fixtures and frames.
An 8% transmission rate means the sheet allows only 8% of the light through, significantly reducing intensity while softening and spreading the beam for a more controlled, even look.
Yes, the Blue Diffusion designation means it both diffuses the light and introduces a subtle blue tint, combining two functions in a single sheet.
Yes, the 20x24" sheet can be easily trimmed with scissors or a craft knife to fit standard gel frames and custom rigs.

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