QMG Minus Green Filter

QMG delivers subtle minus green action designed for mild color correction and fine-tuning applications where full half minus green strength would overcorrect. This quarter minus green filter maintains green transmission at approximately 77 % - only 13 percentage points below red at 90.4 % - creating a gentle correction suitable for sources with modest green dominance. With peak transmission of 96.0 % at 725 nm and exceptional average of 84.7 %, QMG preserves maximum luminance while providing barely perceptible correction. The filter's shallow spectral dip makes it the choice for stacking with other corrections, final fine-tuning passes, and situations where heavy-handed minus green would introduce unwanted color casts.

Key Advantages

• Minimal Over-Correction Risk - Quarter-strength correction with only 13 % red-to-green separation prevents magenta or warm casts, allowing stacking with cooling filters or secondary corrections without accumulating artifacts
• Versatile Fine-Tuning - Ideal as a secondary correction layer or final adjustment pass, providing just enough green suppression for borderline sources without aggressive spectral surgery
• Maximum Light Throughput - 84.7 % average and 96.0 % peak transmission preserves system exposure and supports high-speed production, handheld camera work, and low-light environments
• Hard-Oxide Ion-Assisted Coating - Robust multilayer dichroic coating ensures coating durability and optical consistency through field handling, thermal stress, and extended production deployments
• Custom Format Options - Supplied in round, square, free-form blanks from 5 mm to 450 mm with 0.21-3.8 mm thicknesses on Borofloat, soda-lime, Schott D263 T, or Corning Eagle XG substrates

Typical Applications

• Mixed-Source Refinement - Layer with cooling filters on tungsten key lights to achieve precise white balance when combined with daylight and subtle green-tinted LED fill
• Modern LED Panel Correction - Compensate for the mild green excess in contemporary high-quality LED arrays (Nanlite, Aputure, etc.) without introducing magenta or cool color shifts
• Secondary Correction Pass - Use after primary filtering as a fine-tuning layer to dial in exact white balance on set, allowing incremental correction between full and zero minus green
• Stacking & Lens Filters - Combine with other corrections in multi-filter rigs where cumulative correction strength is managed - less aggressive than standalone HMG variants
• Natural Light Daylight Correction - Subtle shift for outdoor shoots where diffuse daylight picks up slight green casts from foliage reflection or atmospheric scattering

QMG enables rapid iterative filtering and on-set white balance tuning. Request samples for filter stack evaluation and custom production formats.