• Reduce Light Pollution: It can greatly reduce the interference from natural light sources such as moonlight or artificial light pollution such as street lighting;
• Improving Contrast: The filter enhances contrast during visual observation of gaseous and planetary nebulae, even under light-polluted skies. By improving contrast, it makes the nebula stand out more clearly against the sky background, but does not increase the nebula's brightness;
• Strong Applicability: The filter applicable to SVBONY's electronic cameras and astronomical cameras;
• Scope of Application: Useful for imaging emission nebulae, planetary nebulae and supernova remnants.

Note: This filter set is not suitable for telescopes with a focal ratio below f/4

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This SV220 Dual-Band Telescope Filter 2 inches - SV226 Filter Drawer Combination is best for deep space astrophotography.

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• This dual narrow band telescope filter properly designed for astrophotography both in light polluted environment;
• Take color images without needing to combine images with multiple filters. Useful for imaging emission nebulae, planetary nebulae and supernova remnants;
• Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow.

The SKU included in these combinations correspond to the following:

• SV220 Dual band Filter 7nm 2inch, SKU: W9172B
• SV119 M48 Extension Tube kit of 5mm 10mm 15mm 30mm, SKU: F9190A
• UV-IR Cut Filter, SKU: F9127B
• UHC Filter, SKU: F9131B
• SV132 H-Beta Narrowband Filter 2inch, SKU: W9102B
• SV226 Filter Drawer, SKU: W9184A
• SV164 Dark Filter, SKU: W9124B
• SV133 filters wheel 2inch, SKU: W9103B