The Free Gifts for This Product Are Available for 36mm Round and 50mm Square LRGBSHO Full Set Only. 
 
The Free Gifts Will Be Manually Added After the Order Placed. Enjoy!
 
 
Chroma filter sets are renowned for their exceptional optical quality and consistency, making them a top choice among professional astronomers and advanced astrophotographers worldwide. Manufactured in the USA with strict quality control, each filter features ultra-hard, durable coatings that deliver outstanding transmission, precise bandpass performance, and minimal halo or reflection.
 
Designed to meet the demands of modern large-format sensors, Chroma filters provide sharp, high-contrast images across the entire field of view. Available in LRGB and narrowband sets (H-alpha, OIII, SII), they allow you to capture faint deep-sky details with remarkable clarity and true-to-life color balance.
 
Whether you are building a new imaging system or upgrading your current setup, Chroma filters are an investment in premium performance and reliability.
 
 
Chroma LRGB Filter Specifications
 
Chroma LRGB filter sets are available in a wide range of sizes to match different imaging systems, from compact filter wheels to large-format cameras. Each filter is parfocal within the set, polished to 1/4 wave, and coated for high transmission and excellent blocking outside the passband.
 
Sizes: Available in unmounted 31mm, 36mm, 50mm round, as well as 50×50mm, 65×65mm, and other square/rectangular formats for larger sensors.
Bandpasses:
 
Luminance (L): Broad bandpass optimized for maximum transmission while blocking IR/UV light.
Red (R): Central wavelength ~600–700nm, steep cutoffs for accurate color balance.
Green (G): Central wavelength ~500–600nm, high peak transmission with excellent separation from blue and red.
Blue (B): Central wavelength ~400–500nm, sharp cutoff to minimize overlap.
 
Thickness: Standard 3mm (other thicknesses available upon request).
Transmission: >95% peak, with OD5 blocking outside the passband.
 
These filters are optimized for today’s high-resolution CCD and CMOS sensors, ensuring minimal reflections, consistent color calibration, and maximum light throughput.
 
 
Chroma Narrowband Filters – Hα, SII, OIII
 
Chroma narrowband filters are engineered to isolate the key emission lines of deep-sky nebulae with unmatched precision and contrast. Manufactured with ultra-hard coatings for durability and consistency, they provide high transmission in the desired band while blocking unwanted light pollution and continuum background.
    •    Available Bandwidths:
    •    3nm – Maximum contrast, ideal for imaging under heavy light pollution or moonlight.
    •    5nm – Excellent balance of signal strength and contrast; widely used for most imaging systems.
    •    8nm – Higher throughput, suitable for narrowband imaging with fast optical systems (f/2–f/3). Contact us for pre-order.
    •    Central Wavelengths (CWL):
    •    Hα: 656.3nm
    •    SII: 672.4nm
    •    OIII: 500.7nm
    •    Transmission: >90% peak within bandpass; OD5 blocking outside the band.
    •    Thickness: Standard 3mm; other thicknesses available upon request.
 
Chroma narrowband filters ensure consistent parfocality across the set, minimal halos or reflections, and excellent performance with large-format CCD/CMOS sensors. They are the preferred choice for professional observatories and advanced astrophotographers seeking maximum detail in emission nebulae imaging.