ZWO Ha Filter

A 7nm bandpass is quite narrow, which is the key to its effectiveness. It blocks almost all light except for the specific H-alpha wavelength, which drastically increases the contrast of nebulae against the background sky, even if you are shooting from a location with significant light pollution.

This is a 2-inch filter with a standard M48x0.75 male thread. As long as your filter wheel, drawer, or camera adapter accepts 2-inch threaded filters, it will be compatible.

No, this is a narrowband filter designed specifically for deep-sky astrophotography. It is not a solar filter and will not protect your eyes or equipment from the sun's intense light.

While you can technically use it with a color camera, it is designed primarily for monochrome cameras. Using it with a color camera will result in images where only the red pixels are active, significantly reducing your resolution and sensitivity.

Unlike broadband filters that just cut out specific wavelengths, this narrowband filter isolates the H-alpha line entirely. It is far more effective at suppressing artificial light sources like mercury and sodium vapor lamps, allowing you to capture deep-sky objects even under bright city skies.