Optolong L-eXtreme Dual-Band Filter - 2" Mounted
RecommendedOptolong
Optolong L-eXtreme is a Dual narrowband nebula filter in 1.25", 2", clip-in, and other variants for nebula imaging and light-polluted skies.
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Specifications
Filter
- Filter type
- Dual narrowband nebula filter
- Filter size
- 2" Mounted
- Glass thickness
- 1.85 mm
Spectral
- Passbands
- H-alpha 656.3 nm (7 nm) / OIII 500.7 nm (7 nm)
- Band count
- 2 bands
- Narrowest bandpass
- 7 nm
- Blocking
- 300-1000 nm blocking range; light pollution line blocking >99%
Construction
- Substrate / coating
- B270; Multi-layer interference coating
Use
- Camera use
- One-shot color astronomy cameras and modified DSLRs
- Best for
- Emission nebulae from light-polluted skies
- Fast optics note
- Narrow bandpasses can shift on very fast optics; verify halos and star color on f/2 systems
Astrophotography Fit
Best for emission nebulae with one-shot color cameras, especially from light-polluted skies.
Optolong L-eXtreme is a midrange Dual narrowband nebula filter (1.25", 2", clip-in, and other variants). Passbands: H-alpha 656.3 nm (7 nm) / OIII 500.7 nm (7 nm).
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
- Very fast optics unless bandpass shift and halos have been checked
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 |
|---|---|---|---|
| Astronomics Astronomics | $309.00 | In stock Updated 8/4/2026 | View Offer - $309.00 |
| Agena AstroProducts Agena AstroProducts | $329.00 | In stock Updated 8/4/2026 | View Offer - $329.00 |
| High Point Scientific High Point Scientific | $329.00 | In stock Updated 8/4/2026 | View Offer - $329.00 |
| Mile High Astronomy Mile High Astronomy | $329.00 | In stock Updated 8/5/2026 | View Offer - $329.00 |
| Starizona Starizona | $329.00 | In stock Updated 8/5/2026 | View Offer - $329.00 |
| Telescopes.net Telescopes.net | $329.00 | In stock Updated 8/5/2026 | View Offer - $329.00 |
Price History
Chronological retailer pricing with out-of-stock points shown at reduced opacity.