Optolong LRGB CCD 1.25" Mounted Filter Set

The Optolong LRGB CCD 1.25" Mounted Filter Set is a powerful solution for astrophotographers using monochrome CCD and CMOS cameras. This set includes four filters—Luminance, Red, Green, and Blue—each precision-engineered to deliver excellent contrast, sharpness, and color balance in both planetary and deep-sky imaging.

These filters are designed with built-in IR-cut capabilities (700–1100nm), eliminating the need for an additional IR-blocking filter. The optimized transmission curve allows for natural color representation by blocking light pollution wavelengths (e.g., Sodium 589nm) and carefully overlapping the OIII region between green and blue filters. Manufactured from Schott B260 glass and coated using ion-assisted deposition technology, this filter set is durable, scratch-resistant, and precisely tuned for optimal performance.

• Filter Type: RGB Set with Luminance
• Size: 31.75mm (1.25")
• Filter Shape: Round
• Insert Style: Threaded
• Clear Aperture: 26 mm
• Material: Schott B260 optical glass
• Coating: Multi-layer anti-reflection (Ion-assisted deposition)
• IR Cut-Off: 700–1100nm
• Transmission:
  • 95% in pass-band
  • Enhanced color separation by blocking Na at 589nm
• Surface Quality: 60/40 (MIL-O-13830)
• Cell Construction: CNC-machined aluminum, black anodized
• Use Case: Planetary & deep-sky RGB imaging

• Optolong 1.25" Luminance Filter
• Optolong 1.25" Red Filter
• Optolong 1.25" Green Filter
• Optolong 1.25" Blue Filter
• Plastic Filter Case with EVA Lining