This is the full set of the SHO 3nm by Antlia.

SII Specs

Key Features:

High Transmittance: Designed to deliver 88% transmission at the 671.6nm line, providing maximum signal and well-defined nebulae structures.
Optimized Design: Guarantees >88% transmission within 1nm range of the center bandwidth, suitable for both long focal ratios and fast optical systems.
Fast Optics Compatibility: Compatible with systems as fast as f/3, including Hyperstar and RASA, with minimal loss in emission signal.
Outstanding Blocking: OD5 (0.001%) out of band blocking specification ensures an excellent SNR (signal to noise ratio) and effective cut-off rate to minimize interference from other wavelengths.
Halo Minimization: Designed to minimize halos around bright stars for sharper images.
Single Substrate: Utilizes a single substrate to eliminate internal reflections.
Versatile Application: Suitable for SII Emission Nebulae, Planetary Nebulae, Wolf-Rayet Nebulae, and Supernova Remnants.
Adaptable: Ideal for use in both light-polluted areas and dark sites, extending imaging time even under moonlight.
Optical Reliability: Superior optical reliability reduces the need for extensive post-image processing.
Edge Blackening: All Antlia narrowband Pro filters are edge blackened to eliminate internal reflections from stray light.

Please Note:

HA Specs

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.

Warranty:

Key Features:

Optimized FWHM: 3nm bandpass for superior contrast and clarity in nebulae structures.
High Transmission Rates: 85% at the 500.7nm line, maximizing signal capture.
Versatile Compatibility: Ideal for long focal ratios and fast optical systems, including f/3, Hyperstar, and RASA.
Advanced Blocking: Rated OD5 (0.001%) to diminish wavelength interference and enhance SNR.
Minimized Star Halos: Designed to reduce halos for crisper astrophotography.

Usage Cautions:

Not for Solar Use: Avoid solar observing and imaging to prevent eye damage.
Not for Visual Observation: Specifically crafted for imaging, not suitable for visual observation.
Safety Warning: Never observe the sun directly with this filter.

Quality Substrate: Utilizes an optical-grade substrate for precision.
Filter Thickness: Maintains a standard 2mm thickness within a ±0.05mm tolerance.
Defined FWHM: A narrow 3nm full width at half maximum.
Central Wavelength Clarity: Centered at 500.7nm for clear OIII data.
Transmittance Assurance: More than 85% peak transmission.
Stringent Blocking: Over 5 OD to ensure clean data capture.
Surface Standard: 60/40 scratch/dig ratio, compliant with MIL-O-13830.
Wavefront Accuracy: Lambda/4 precision for sharp imaging.
Exact Parallelism: Ensured to be less than 30 arcseconds for consistent focus.

Durability and Assurance: