ALP-T Dual Band 3nm Ha/OIII + SII/OIII Filter Set
Antlia
~$778.31
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In stock
The Antlia ALP-T Dual Band 3nm Ha/OIII + SII/OIII Filter Set is a premium narrowband filter combination designed for high-contrast deep-sky imaging with one-shot color (OSC) cameras. This two-filter set captures four emission nebulae channels—Ha, OIII, SII, and H-beta—enabling false-color and narrow-band imaging with superior signal-to-noise ratios. The ultra-narrow 3nm and 3.5nm passbands with optical density 4.5 suppression effectively block light pollution, moonlight, and airglow, making it ideal for astrophotographers in urban or rural environments seeking detailed nebulae images and flexible post-processing palettes.
Specifications
| Ha/OIII Filter Passband | 3 |
| SII/H-beta Filter Passband | 3.5 |
| Ha Wavelength | 656.3 |
| OIII Wavelength | 500.7 |
| SII Wavelength | 672.4 |
| H-Beta Wavelength | 486.1 |
| Optical Density | 4.5 |
| Mount Size | 2 in |
| Recommended Telescope F-ratio | f/4 or slower |
| Camera Type | OSC/Color DSLR/CMOS/CCD |
| Number of Filters | 2 |
| Bandpass Type | Dual Band |
| Filter Technology | Ion Gun Assisted Deposition multi-layer coating |