🛒 LEVIATHAN Spectral Pro Light Pollution Filter
 
Precision optical filtering for professional observatories and serious astrophotographers.
 
🧠 Engineered for Maximum Impact
 
The LEVIATHAN Spectral Pro is a next-generation light pollution suppression filter, designed using real-world spectral data from cities across the globe. It selectively blocks actual skyglow sources while preserving the critical emission bands used in deep-sky imaging.
 
🚫 Blocks dominant LED and sodium light pollution bands
🌌 Passes scientifically selected astrophotography bands
🔬 Optimized through rigorous laboratory testing and real-sky validation
 
🚀 Optimized for Fast f/2 Systems
 
Fast optical systems (like Hyperstar, Rokinon/Samyang, or f/2 astrographs) often suffer from reduced filter performance due to steep angles of incidence. The Spectral Pro is specifically engineered for these conditions:
 
✅ Maintains >95% transmission at f/2
✅ Minimizes band shift and edge roll-off
✅ Delivers consistent spectral response across the entire image circle
 
This ensures wide-field, fast-ratio imaging systems perform at their full potential—without introducing artifacts or contrast loss.
 
🌈 Halo-Free Imaging by Design
 
Many filters suffer from internal reflections and bright star halos, especially around emission-line targets like Sirius or Vega. The Spectral Pro eliminates these issues through:
 
🧪 Precision broadband AR coating to suppress internal reflections
🧼 Optical-grade polishing and flatness to minimize back-reflection paths
🧰 Careful substrate selection and coating stack design to avoid ghosting
The result: Clear, clean star profiles—even around the brightest stars in the sky.
 
📊 Performance Highlights
 
✅ >98% transmission on-axis
✅ >95% at f/2 across critical bands
✅ Advanced multiband coating with precise spectral targeting
✅ High-efficiency broadband AR coating on both surfaces
✅ Flat response across the field for full-frame sensors
 
🎯 One Filter to Rule Them All
 
This is not a typical broadband or narrowband filter. The Spectral Pro is a hybrid spectral design that works across a wide range of targets and environments. No need for:
 
Filter wheels
Monochrome sensors
Complex stacking and masking
 
Whether you're imaging nebulae, galaxies, or Milky Way panoramas, the Spectral Pro delivers a consistent, high-contrast result from city suburbs to dark sites.
 
🔍 Zero-Compromise Optical Design
 
Most filters on the market induce corner vignetting—especially on full-frame sensors—because they use undersized glass or poorly designed mounts. The Spectral Pro is:
 
📐 Simulated in full optical design software
🧪 Tested across a wide range of systems
🛠️ Optimized to reduce mechanical and optical vignetting
 
If any vignetting remains, it’s likely due to non-uniform illumination inherent in your optical train—not from the filter.
 
🧪 Versatile in Advanced Setups
 
Thanks to its spectral neutrality and optical precision, the Spectral Pro also functions as a luminance filter in monochrome or narrowband setups.
 
🛠 Custom Sizes Available
 
Need a different filter size or mount format?
Custom shapes and mechanical configurations are available—please contact us to discuss your requirements.
 
💼 International & VAT-Free Orders
 
🌍 VAT-free sales available on request
📦 Worldwide shipping in durable, lab-grade packaging