ZWO Narrowband Filter

This set includes the three essential narrowband filters for astrophotography: H-Alpha, SII, and OIII.

These filters are standard 1.25-inch (31.75mm) size, designed to fit most standard telescope filter wheels or eyepiece holders that accept 1.25-inch accessories.

With a 1/4 wave polishing accuracy and multi-layer anti-reflection coatings, these filters minimize distortion and maximize light transmission up to 80%, resulting in significantly sharper and more detailed images of nebulae.

Yes, narrowband filters are specifically designed to block most light pollution by only allowing specific wavelengths of light emitted by nebulae to pass through, making them excellent for urban astrophotography.

Each filter comes in its own individual plastic storage case, which provides protection against dust and scratches when the filters are not mounted in your equipment.

While these are primarily designed for long-exposure astrophotography to capture faint details, they can be used visually, though the view will be extremely dim due to the narrow bandwidth of the light allowed through.