• DayStar Quantum H-Alpha 0.5 angstrom PE solar filter .5QPE narrow hydrogen alpha filter ideal for serious and advanced astronomers providing a precise specialized and high performance 0.5 angstrom bandpass hydrogen alpha solar filter solution for viewing solar prominences solar filaments chromospheric features and fine solar surface detail in stunning high contrast hydrogen alpha light for advanced sun viewing and solar photography — Telescope Wolves
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Daystar

DayStar Quantum H-Alpha 0.5Å PE Solar Filter — Versatile H-Alpha Passband for Solar Surface and Prominence Viewing

DayStar Quantum H-Alpha 0.5Å PE Solar Filter — Versatile H-Alpha Passband for Solar Surface and Prominence Viewing

$21,990.00
$21,990.00
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At 0.5Å, chromospheric contrast sharpens markedly — fine filament structure, spicule boundaries at the limb, and subtle active region detail that washes out at wider bandpasses begin to resolve clearly. The DayStar Quantum 0.5Å PE is the narrowest H-Alpha etalon that still delivers practical brightness in average apertures without requiring a telescope purpose-built for solar work. PE-grade certification means every unit is individually tested for etalon homogeneity and on-band transmittance, with documentation provided. For observers ready to move past the 0.6Å and extract genuine chromospheric resolution. Ships free to the US.

Specifications
Wavelength H-Alpha (656.3nm)
Filter Type Fabry-Pérot etalon (electrically heated for thermal stability, electronically tunable)
Grade PE — certified substrate homogeneity and on-band transmittance; individual unit documentation included
Bandpass (FWHM) 0.5Å at f/30 — deep chromospheric contrast; spicule and filament structure clearly resolved; prominence visibility reduced vs. wider bandpass
Optimal f/Ratio Best performance at f/30; bandpass narrows further at slower ratios
Wavelength Display Live LCD readout, accurate to 0.1Å
Tuning Red/blue wing shift buttons; Doppler velocity mapping capable
Computer Control Serial port for on-screen wavelength display and automation
Power 12VDC (100–240VAC supply included with US, EU, UK, and AU adapters)
ERF Required Yes — front-mount Energy Rejection Filter required; sold separately
What's in the Box Quantum PE 0.5Å filter, certification documentation, 100–240VAC power supply with international adapters (US, EU, UK, AU)
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Frequently Asked Questions

With a beginner telescope you can see a surprising amount — the craters and mountains on the Moon, the rings of Saturn, the moons of Jupiter, and star clusters like the Pleiades. As you get more comfortable, you can also spot nebulae and distant galaxies. Not sure which beginner telescope is right for you? Check out our Telescope Buying Guide.
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All telescopes on Telescope Wolves are hand-picked with beginners in mind. If you're unsure which telescope is right for you, check out our Telescope Buying Guide.
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