iOptron 1.25" Narrowband Filters (H-Alpha, OIII, SII)

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The iOptron 1.25" Narrowband Filters are designed for astrophotography and nebula observation. Each filter isolates a specific narrow band of light, improving contrast by blocking unwanted wavelengths from artificial lighting (mercury vapor, sodium vapor) and natural sky glow. These filters allow you to reveal fine structural details in emission nebulae while maintaining a natural look in your images. Key Features 1.25" mounted filter for filter wheels (e.g., iOptron iEFW-15). Compatible with 1.25" eyepieces (M28.5 x 0.6). Multi-layer anti-reflection coating for maximum transmission. High optical quality: 60/40 surface quality, Show more