Astronomik H-alpha Imaging Filter

A 12nm bandpass acts like a narrow gate, allowing only the specific wavelength of light emitted by hydrogen-alpha gas to pass through to your sensor. This effectively blocks out light pollution and other unwanted wavelengths, resulting in much higher contrast and clearer detail in nebulae.

No, you won't. This filter features a parfocal design, meaning it is engineered to maintain the same focus point as other filters in the Astronomik line, allowing for seamless switching during your imaging sessions.

Yes, it is highly effective in light-polluted environments. Because it isolates the specific hydrogen-alpha emission line, it ignores the broad-spectrum light pollution from streetlights and city glow, letting you capture deep-sky objects even from less-than-ideal locations.

Yes, this is a standard 1.25-inch mounted filter designed to fit most common filter wheels and eyepiece holders. It is 1mm thick, so it should integrate easily into your existing imaging train.

The filter is built with a moisture- and scratch-resistant coating, making it quite durable for field use. It is designed to withstand the rigors of outdoor astrophotography and comes with a 10-year warranty for added peace of mind.

While it is specifically optimized for digital sensors, it can be used visually. However, keep in mind that the 12nm bandpass is very narrow, so you will need a telescope with a significant aperture to see much detail through the eyepiece.