The StarGuy Moon & Skyglow 1.25" filter is designed to darken the background sky by blocking light transmission from skyglow and light emissions from artificial light. Its high efficiency preserves image brightness, reveals more details and increases contrast of the moon, galaxies, nebulae and globular star clusters.

• Thickness 2.0mm
• Surface Quality: 60/40 (Refer to MIL-O-13830)
• Fine-optically polished to ensure accurate 1/4 wavefront and <30 seconds parallelism over the both surface
• Multi Layer Coating

This filter is not designed for observation of the sun.