Omegon Pro Veil H-Alpha Filter 3nm 2 inch

Omegon Pro Veil H-Alpha Filter 3nm 2 inch: the narrowest passband on hydrogen

With a transmission of only 3 nanometers, this filter cuts even sharper than the 7 nm version. It blocks almost all disturbing artificial light and only lets through the red light from HII regions.

Pro Veil is Omegon's narrow-band series for astrophotography. Each filter comes in a 2-inch aluminum mount with a sturdy protective case.

Where 3 nm makes a difference

The smaller the aperture, the lower the background signal in your recording. Under strong light pollution or moonlight, this results in visibly more contrast than a wider band. The background remains dark, even with long exposures.

What the cost of electricity is

A narrower band also lets through less stray light. Expect longer exposure times per frame than with a 7 nm filter. This is manageable for fast optics, but with long focal ratios, the total session duration increases.

Combine into a color image

In the SHO palette, H-alpha forms the red channel. If you choose the same bandwidth for all three channels, the exposure times will remain comparable to each other.

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Combine with the Pro Veil OIII 3nm and Pro Veil SII 3nm for a consistent 3nm set in your 2-inch filter wheel.

For whom yes and for whom no

• ✓ Advanced astrophotographers under severe light pollution
• ✓ Whoever wants to work by moonlight
• ✓ Owners of fast optics
• ✗ Beginners: start with 7 nm or broadband
• Visual observers: too little light is coming through

Specifications

You can find more accessories for this brand at the Omegon brand page.