Antlia ALP-T Dual Band SII&Hβ 3.5nm
- Precise Narrowband Filtering for Exceptional Contrast
- Enhanced Transmission for Superior Signal-to-Noise Ratio
- Anti-Reflection Coating to Reduce Halo Effect
- Optimized for Fast Optics up to f/2
The Antlia ALP-T Dual Band Filter Set is a high-performance toolset designed for astrophotographers who demand precision, contrast, and exceptional image quality. This set includes the Ha&OIII 3nm Filter and the SII&Hβ 3.5nm Filter, providing unmatched narrowband imaging capability for capturing deep-sky objects with remarkable clarity and detail.
Superior imaging in challenging light conditions.
Suitable for capturing traditional RGB images or creating artistic false-color palettes.
Compatible with optics slower than f/4, with high-speed versions available for faster setups.
The SII&Hβ filter captures the deep red Sulfur-II (672.4nm) and blue Hydrogen-Beta (486.1nm) emission lines, providing complementary spectral data to the Ha&OIII filter. It’s perfect for creating detailed narrowband images and vibrant false-color palettes.

|
FWHM |
3.5mm |
|
Peak Transmission |
90% (SII), 85% (Hβ) |
|
Blocking |
≥ OD4.5 (300-1100nm) |
|
Ring Design |
Ultra-thin and black anodized to minimize reflections |
SII&Hβ Filter
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