ZWO Filter

A 7nm bandwidth is narrow enough to effectively block light pollution and moonlight while allowing only the specific wavelengths of light emitted by nebulae to pass through. This results in significantly higher contrast and allows you to capture deep-sky objects even from light-polluted suburban skies.

While these filters are primarily designed for monochrome cameras to create Hubble-palette images, they can technically be used with color cameras. However, because color cameras have a Bayer matrix, you will lose significant resolution and sensitivity, so they are best paired with a dedicated monochrome astrophotography camera.

Yes, because this set includes three separate filters (Ha, SII, and OIII), you will need an electronic filter wheel to switch between them during your imaging session. This allows you to automate the capture process for each channel without manually changing filters.

This specification ensures that the glass is polished to a very high degree of flatness, which prevents image distortion or star bloating. It guarantees that your optical train remains sharp, ensuring that the light passing through the filter doesn't degrade the quality of your final image.

No, these are strictly designed for astrophotography. Because they have such a narrow bandwidth, they block almost all visible light, making them too dark for human eyes to see through a telescope eyepiece.

These are 36mm unmounted round filters. You should check your filter wheel or camera adapter specifications to ensure they accommodate 36mm filters, as they are not standard 1.25-inch or 2-inch threaded filters.