Antlia designed the LRGBR+ Dark series filters with a full-spectrum curve from 390nm to 1000nm, making them sensitive to both UV and IR light. This wide range boosts your signal-to-noise ratio and contrast for deep sky, full-spectrum astrophotography.

These filters use quartz glass, chosen for its exceptional thermal and mechanical stability. Thanks to its ultra-low thermal expansion, quartz gives the filters outstanding durability, allowing you to image and conduct research in even the harshest environmental conditions.

Since many cameras have high quantum efficiency (QE) in the near-infrared range, Antlia includes a Red+ filter (700-1000nm) in the LRGB Dark series. This filter captures valuable IR signals that standard LRGB filters miss.

When processing your images, simply combine the R and R+ channels to create a new R channel. After that, follow the same workflow you’d use with regular LRGB filters.

For best results, pair the LRGBR+ Dark series with Antlia’s SHO 2.8nm and 2.5nm Ultra Narrowband filters. These filters share the same quartz substrate and refractive index, ensuring better parfocal performance across your setup.

Application and Performance:

• Delivers full-spectrum sensitivity, enhancing imaging in both UV and IR light

• Achieves high transmittance: B filter ≥95%, L-R-G filters ≥97%, ensuring minimal signal loss and maximising contrast

• Uses quartz glass for excellent durability, thermal stability, and superior resistance to fractures, scratches, and wear from cleaning

• Captures more infrared signal by combining with the Red+ filter

• Blocks unwanted wavelengths with an out-of-band blocking rate of OD4.5 (0.005%), reducing interference and minimising halos around bright stars

• Matches standard filter thickness and undergoes double-sided fine polishing to maintain parfocality across your setup

• Features full-edge coatings and edge-blackened unmounted filters to eliminate internal reflections from stray light

• Resists scratches for long-lasting performance

• Backed by a 3-year warranty against delamination

Spectrum Curves:

Not Recommended:

Solar imaging

Night visual observation