Antlia Filters H-Alpha 3nm Pro: Precision Imaging for Deep Sky Astrophotography

The Antlia H-alpha 3nm Pro is a premium narrowband filter designed for astrophotography, offering unparalleled clarity and contrast in capturing celestial phenomena. By fine-tuning the Full Width Half Maximum (FWHM) to a narrow 3nm bandpass, it significantly enhances the contrast of emission targets against the night sky. With a remarkable 88% transmission at the critical 656.3nm H-alpha line, this filter promises maximum signal reception and crisply defined nebulae structures, making it a valuable tool for both amateur and professional astronomers.

Key Features:

• Optimized FWHM: 3nm bandpass for heightened contrast in nebulae and other emission objects.
• High Transmission Rate: Delivers 88% transmission at the H-alpha 656.3nm line for optimal signal capture.
• Versatile Use: Compatible with both long focal ratios and fast optical systems, including Hyperstar and RASA.
• Effective Blue-Shift Performance: Suitable for systems as fast as f/3, ensuring minimal loss in emission signal.
• Superior SNR and Blocking: OD5 blocking specification (0.001%) minimizes interference from other wavelengths, enhancing the signal-to-noise ratio.
• Minimized Star Halos: Specially designed to reduce halos for clearer, sharper images.
• Safety Precautions: Not recommended for solar observing or visual observation; direct solar observation can result in serious eye damage.

Quality Assurance and Design Philosophy:

• Advanced Design: Focus on blocking and band-pass parameters to achieve optimal results, with a strong out-of-band blocking rate.
• Individual Testing: Each filter is rigorously tested and scanned to meet high-performance standards.
• Premium Quality: Offers excellent contrast with dark backgrounds and high H-alpha transmission, albeit at a higher production cost.
• Competitive Pricing: Provides a favorable price-to-performance ratio compared to similar premium filters in the market.

The Antlia H-alpha 3nm Pro narrowband filter is an indispensable asset for deep sky astrophotography, ensuring that every capture is imbued with extraordinary detail and contrast. This filter stands as a testament to Antlia's commitment to quality and performance in the field of astronomical imaging.

Specifications

• Substrate: Schott optical material for premium quality.
• Filter Thickness: 2mm ±0.05mm, ideal for 1.25'' mounts.
• FWHM: Narrow 3nm for precise filtration.
• CWL: Targeted at 656.3nm for H-alpha emissions.
• Peak Transmission: Over 88%, ensuring clear captures.
• Blocking Efficiency: Greater than 5 OD at 300-1000nm wavelengths.
• Surface Quality: 60/40 scratch/dig as per MIL-O-13830.
• Wavefront Accuracy: Lambda/4 or higher.
• Parallelism: Maintained under 30 arcsec.
• Construction: Non-glued, single substrate for durability.

Warranty:

• Duration: 3 years, protecting against delamination.