Astronomik H-Alpha 12nm Filter

Astronomik H-Alpha 12nm Filter – Premium Narrowband Filter for Deep-Sky Astrophotography

The Astronomik H-Alpha 12nm Filter is one of the most essential tools for serious deep-sky astrophotographers who want to capture stunning details in nebulae, emission clouds, and faint H-II regions. Designed with exceptional German optical precision, this narrowband filter isolates the 656nm Hydrogen-Alpha emission line, allowing astrophotographers to produce high-contrast, ultra-sharp images even under heavily light-polluted Indian skies.

Whether you are imaging with DSLRs, mirrorless cameras, astronomy CCD/CMOS cameras, or cooled astrophotography cameras, the Astronomik H-alpha 12nm delivers unmatched clarity, minimal haloing, and perfect parfocal performance with other Astronomik filters.

ey Features of the Astronomik H-Alpha 12nm Filter

✔ 12nm Narrowband Bandwidth

Perfect balance between signal strength and contrast—ideal for both entry-level and advanced astrophotographers.

✔ Exceptional Performance in Light Pollution

Blocks over 99% of unwanted light, making it highly effective for imaging from
Delhi, Mumbai, Bangalore, Chennai, Hyderabad, Pune, Kolkata, and other bright urban skies.

✔ True 656nm H-Alpha Line Isolation

Captures fine emission nebula structures such as:

• Orion Nebula

• Rosette Nebula

• California Nebula

• Lagoon & Trifid Nebula

• Heart & Soul Nebula

• North America Nebula

✔ Perfect for DSLR, CMOS & CCD Cameras

Designed for both colour and monochrome cameras; excellent for Ha channel data in H-alpha, HOO, and SHO (Hubble Palette) imaging.

✔ Ultra-Durable Coatings

Scratch-resistant, humidity-proof, temperature-stable—built for long-term Indian observing conditions.

✔ Parfocal With Other Astronomik Filters

Seamless integration with Astronomik OIII, SII, CLS, UHC, and H-beta filters.

Why Choose the Astronomik H-Alpha 12nm Filter?

The 12nm H-alpha version is the best all-rounder for most telescopes in India, providing:

• Greater signal for faster imaging

• Reduced exposure time

• Higher contrast for nebulae

• Excellent results from Bortle 7–9 skies

• Superior optical quality for refractors, Newtonians, SCTs, RCs, and astrographs

Its high transmission and precise multi-coatings make it one of the most reliable filters for astrophotography in India.

Technical Specifications

• Central Wavelength: 656nm (H-Alpha)

• Bandwidth (FWHM): 12nm

• Transmission: > 96% at peak

• Optical Thickness: 1mm (parfocal design)

• Surface Quality: Professional-grade, no halos or reflections

• Available Sizes: 1.25-inch & 2-inch

• Made in Germany

Ideal For:

• Deep-sky astrophotography

• Narrowband imaging from light-polluted cities

• Imaging emission nebulae and H-II regions

• DSLR/CMOS mono and colour imaging

• Long-exposure astrophotography

Why Buy from Modern Telescopes?

Modern Telescopes is India’s largest telescope distributor and an authorized seller of Astronomik Filters. When you shop with us, you get:

• 100% original imported Astronomik products

• Full warranty & after-sales support

• Fast delivery across India

• Expert astrophotography guidance