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:

• Not recommended for solar observing and imaging.
• Not suitable for visual observation.
• DO NOT LOOK AT THE SUN WITH ANTLIA FILTERS; serious eye damage may result.

• Basic Substrate: Schott optical substrate
• Filter Thickness: 2mm+/-0.05mm for 1.25'' mounted
• FWHM (Full width at half maximum): 3nm
• CWL (Central Wavelength): 671.6nm
• Peak Transmission: >88%
• Blocking: > 5 OD (0.001% out of band blocking) @ 300-1000nm
• Surface Quality: S/D (scratch/dig)= 60/40 (Refer to MIL-O-13830)
• Transmitted Wavefront: Lambda/4 or better
• Parallelism: Less than 30 arcsec
• **Single / Non-glued substrate
• Warranty: 3-years against delamination

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.

• 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.

OIII Specs

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:

• Warranty Protection: 3-year guarantee against delamination.