SVBONY TWM1 SV220 Telescope Filter, Dual-Band Nebula Filter, H-Alpha and O-III Narrowband Filter for One-Shot Color Cameras, Light Pollution Filter for Astrophotography (2 inches)

SVBONY dual narrowband H-Alpha/O-III 7nm narrowband filters are specially designed for astrophotography in light-polluted environments, allowing imaging under bright artificial light pollution and moonlight conditions to capture color images without using multiple filter combinations. Images are most useful with single-use color cameras; can be used for imaging emission nebulae, planetary nebulae, and supernova remnants; high transmittance and sharp cutoff can greatly enhance contrast, showing the most detailed information about deep sky objects; designed to drastically cut off sodium Artificial light interference from vapor or mercury vapor street lights and other unwanted interference (e.g. sky glow); Dual Band Narrow Band Filters are not suitable for visual observation and are not designed for imaging or observing the sun. Please note that the SV220 is not well suited for fast telescopes, some users have reported that dual-band OSC filters paired with RASA can cause band shifts, thus clipping HA data.

• Reduce light pollution; SV220 telescope filter can greatly reduce the interference from natural light sources such as moonlight or artificial light pollution such as street lighting
• Astrophotographic;the filter enhances contrast during visual observation of gaseous and planetary nebulae in all sky conditions; the filter allows high-contrast imaging even in areas with strong light pollution
• Improving contrast; an increase in contrast can be perceived as an increase in brightness; the filter makes the contrast of the nebula and sky background increase; not the nebula brighter
• Easy to use; the dual-band filter makes it possible to simplify and decrease the difficulty and cumbersomeness of post-processing for users
• For deep sky photography; use the dual-band filter to enable deep-sky photography in light-polluted cities or under a full moon