SVBONY UHC Filter (Ultra High Contrast) – Light Pollution Reduction for Nebula Imaging

A UHC (Ultra High Contrast) filter is designed to improve contrast on many emission nebulae by reducing common wavelengths from artificial light pollution while allowing key nebular emission lines to pass. This can make nebula structure stand out more clearly for visual observing and for astrophotography—particularly from suburban or urban skies.

What a UHC Filter Does

This filter is designed to enhance nebula visibility by transmitting major nebula emission lines while suppressing much of the off-band light associated with common artificial lighting. It is commonly used for improving contrast on targets such as emission nebulae and many planetary nebulae.

Coatings & Mechanical Build

The filter features multi-layer coatings designed to reduce reflections and improve transmission. The body is precision-machined from metal for durability and stable fitment in use.

Specifications

• Type: UHC Filter
• Spectrum Range: 300–700 nm
• Optical Density: OD3
• Surface Quality: 60/40
• Transmitted Wavefront RMS: λ/4
• Parallelism: 30″

Spectral Performance

Designed to provide high transmission around key nebular emission lines (including OIII and H-beta, plus additional nebular lines), while strongly suppressing off-band light associated with many artificial lighting sources.

Application & Camera Compatibility

This filter is intended for astrophotography use with compatible colour cameras and unmodified DSLR bodies (as applicable to the specific clip-in / mount type supplied). If your camera system uses different lens mount formats, please verify compatibility before purchase.

Important: This filter is not suitable for EF-S camera lenses. Please confirm your camera and lens/mount compatibility.

Package Contents

• 1 × SVBONY UHC Filter (clip / mount type as supplied)
• 1 × Protective plastic case

Safety Warning

• Do not use this filter for solar observation.
• Never look at the Sun through a telescope or camera system without a proper certified solar filter.