EMG Minus Green Filter

EMG represents the gentlest minus green option, delivering minimal spectral alteration for precision color temperature adjustment. This eighth minus green filter maintains green at 83.2 % and blue at 83.1 % - nearly indistinguishable from each other - while red reaches 91.0 %, creating an imperceptible 8 % shift in green channel. Peak transmission of 95.1 % at 715 nm and 79.2 % average support maximum light retention with virtually no color cast artifacts. EMG excels for final micro-adjustments, layering with other corrections, and situations requiring mathematically exact minus green density without visible color contamination. The filter's sharp NIR cutoff (63.8 %) adds bonus thermal control.

Key Advantages

• Imperceptible Correction - Only 8 % green-to-red separation makes EMG invisible to the eye, functioning as a precision dial-turner for final white balance adjustment without introducing perceived color shifts
• Mathematical Accuracy - Delivers repeatable minus green density for scientific applications, standardized testing, and situations requiring measurable spectral control without perceptual artifacts
• Exceptional Peak Transmission - 95.1 % at 715 nm and minimal dips across visible spectrum preserve luminance for low-light handheld work, high-speed cinematography, and exposure-critical scenarios
• Hard-Oxide Ion-Assisted Coating - Durable multilayer dichroic structure withstands environmental stress and field handling, maintaining optical consistency throughout extended production use
• Custom Format Options - Available in round, square, free-form blanks spanning 5 mm to 450 mm at 0.21-3.8 mm thickness on Borofloat, soda-lime, Schott D263 T, or Corning Eagle XG substrates

Typical Applications

• Precision White Balance Dialing - Final micro-adjustment layer for achieving exact Kelvin temperature match when layered with heavier corrections, eliminating over-correction from full minus green filters
• Scientific & Medical Measurement - Provide repeatable, measured green suppression for spectral analysis, color matching standards, and diagnostic imaging where imperceptible correction is scientifically required
• Multi-Filter Stack Configuration - Combine with HMG and QMG options to achieve custom minus green densities while maintaining visibility of each layer's incremental contribution
• High-Speed & Low-Light Cinematography - Maximize available light in challenging conditions where every percentage of transmission matters, using EMG for invisible correction without exposure penalty
• Thermal Control Applications - Leverage 63.8 % NIR transmission to suppress infrared heat generation in sensitive equipment or long-duration handheld shooting while fine-tuning green

Prototype EMG with rapid turnaround for precision testing. Supports full production in custom diameters, thicknesses, and substrate specifications.