Purpose-built for monochrome CMOS/CCD astrophotography: balanced LRGB passbands deliver vivid, accurate color with maximum signal efficiency
Individually verified: each filter ships with its own spectrographic test report so you know exactly what’s in your optical train
Bright data, tight stars: ultra-high peak transmission (~96.5–98.5%) paired with advanced UV/IR blocking minimizes star bloat—especially on refractors
Cleaner stars, fewer halos: precision AR (anti-reflection) coatings and a black resin edge mask suppress internal reflections for pristine stellar profiles
True parfocal workflow: all filters are parfocal at 1.85 mm thickness to speed up multi-channel imaging sessions
Color that clicks: Red, Green, and Blue bands are carefully matched and nested within the Luminance window for pure tones and efficient color combination
Built to pro standards: high-accuracy dichroic/dielectric coatings with deep off-band blocking, mounted in precision CNC cells for strain-free, tilt-free alignment
Durable optics: premium glass with a 60/40 scratch-dig rating stands up to regular handling and filter wheel duty
Specifications
Format: 2" mounted LRGB filter set (ColourPRO series, R1)
Camera compatibility: Mono CMOS and CCD
Peak transmission: ~96.5–98.5% (per filter)
Blocking: Advanced UV/IR block; deep off-band rejection
Coatings: Multi-layer dichroic/dielectric with AR (halo-suppressing) treatment
Optical thickness / parfocality: 1.85 mm (parfocal across the set)
Glass quality: 60/40 scratch-dig
Edge treatment: Black resin peripheral coating to reduce internal reflections
