- Dual-band: Hα 656.3 nm (3.7 ± 0.5 nm) & OIII 500.7 nm (3.2 ± 0.5 nm)
- Transmission ≥ 85%; OD 5 blocking 200-1100 nm
- Glass thickness 1.85 mm; total frame ≈ 7.5 mm
- Special coating eliminates halos around bright stars
Showing all 5 results
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Anti-Halo PRO Dual-Band 2 inch Ha+OIII filter
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L-eXtreme
- Dual 7 nm narrowband (H-α 656.3 nm & OIII 500.7 nm).
- Deep LP blocking – OD4 from 300–1000 nm for darker backgrounds.
- 2″ mounted (M48×0.75), 1.85 mm substrate with multi-layer AR coatings.
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L-Synergy
- Dual 7 nm narrowband (SII 672.4 nm & OIII 500.7 nm).
- Durable coatings – multi-layer AR with ion-assisted deposition for stability and scratch resistance.
- 2″ mounted (M48×0.75), 1.85 mm substrate with multi-layer AR coatings.
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L1 Dual-Combo Set
- Two-filter bundle — includes 1× L-Quad Enhance (quad-band broadband) + 1× L-Para (dual 10 nm narrowband).
- Broadband–narrowband synergy — natural RGB colour from L-QEF plus boosted Hα/OIII detail from L-Para.
- High transmission — L-Para >85% at Hα/OIII (f/2 and slower); L-QEF designed to preserve colour balance while cutting LP.
- 2″ mounted — M48×0.75; supplied together in one package.
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L2 Dual-Combo Set
- Two-filter bundle — includes 1× L-eXtreme (OIII-7nm & Ha-7nm) and 1x L-Synergy (OIII-7nm & SII-7nm).
