Antlia ALP-T 5nm H-alpha/OIII Highspeed Dual-Band Filter - 2" Mounted
Antlia
Antlia ALP-T Dualband 5nm Ha & OIII Highspeed Filter - 2" Mounted is a multi-band nebula filter in 2" for nebula imaging and light-polluted skies.
Best Current Offer
Specifications
Filter
- Filter type
- Dual-band / multi-band nebula filter
- Filter size
- 2" / Mounted
Spectral
- Passbands
- H-alpha 656.3 nm (5 nm) / OIII 500.7 nm (5 nm)
- Band count
- 2 bands
- Narrowest bandpass
- 5 nm
Specifications
- Transmission
- 88%
- Thickness
- 2 mm
Use
- Camera use
- Color or mono astronomy cameras, depending on target and workflow
- Fast optics note
- Fast-optics optimized
Astrophotography Fit
Best for emission nebulae with one-shot color cameras, especially from light-polluted skies.
Antlia ALP-T Dualband 5nm Ha & OIII Highspeed Filter - 2" Mounted is a midrange multi-band nebula filter (2").
Best for emission nebulae with one-shot color cameras, especially from light-polluted skies.
Choose filter size around the sensor diagonal, telescope speed, and filter-wheel or drawer geometry. Flats are still required; a filter can improve contrast, but it will not rescue tilt, bad focus, or poor calibration.
Best paired with
- One-shot color cooled cameras or modified DSLRs
- Emission nebulae rich in H-alpha, OIII, SII, or H-beta signal
- Filter drawer or wheel sized to avoid vignetting
Not recommended for
- Broadband galaxies, reflection nebulae, or clusters as the main use case
- Monochrome SHO workflows that need separate channels
- Slow optical systems if the filter was specifically shifted for f/2 use
Where To Buy
Some links on this page are affiliate links. Prices and availability are pulled automatically from each retailer and updated daily.
| Retailer | Price | Availability | View Offer |
|---|---|---|---|
| Starizona Starizona | $418.00 | In stock Updated 8/5/2026 | View Offer - $418.00 |
Price History
Chronological retailer pricing with out-of-stock points shown at reduced opacity.