The O-III 1.25" nebula filter from Explore Scientific is designed to enhance your deep sky observations by blocking nearly all artificial light. This filter only allows the emission lines of oxygen to pass through, thus enabling the visualization of emission nebulae with greater contrast and detail. Even under a slightly illuminated sky, this filter reveals celestial objects otherwise invisible, such as the Cirrus nebula.

Features:

• Diameter: 1.25’’
• Blocks almost all artificial light
• Allows only the oxygen emission lines to pass
• Enhances the visibility of emission nebulae

Benefits:

• Optimizes clarity and contrast of observations under light-polluted skies
• Enables detection of details in nebulae that would be invisible without a filter
• Ideal for amateur astronomers seeking better deep sky observation performance

Compatibility:

• Compatible with 1.25’’ eyepiece holders

This O-III Explore Scientific filter is an excellent choice for any astronomy enthusiast looking to enhance their emission nebula observations and fully enjoy the beauty of the deep sky.