With the Hydrogen-Beta line of the spectrum isolated, the Astronomik 12nm H-Beta filter can detect faint nebulae like the Horsehead, the Cocoon, or the California.

With the Hydrogen-Beta line of the spectrum isolated, the Astronomik 12nm H-Beta filter can detect faint nebulae like the Horsehead, the Cocoon, or the California.

With the Hydrogen-Beta line of the spectrum isolated, the Astronomik 12nm H-Beta filter can detect faint nebulae like the Horsehead, the Cocoon, or the California.

With the Hydrogen-Beta line of the spectrum isolated, the Astronomik 12nm H-Beta filter can detect faint nebulae like the Horsehead, the Cocoon, or the California.

Look at this, an Astronomik H-Beta Filter for your Canon EOS camera that clips in above the mirror! All normal functions of your EOS camera will be unaffected... focus, image stabilization, etc.

The Astronomik 12nm H-Beta CCD Filter has T-threads on both sides, allowing you to attach it to a T-adapter, etc. and still present a T-thread on the other side.

The Astronomik CLS Filter is considered the highest quality light pollution filter on the market today.

The Astronomik CLS Filterprovides nearly 100% transmission between 450nm and 530nm.

Wow, an Astronomik CLS Light Pollution Filter for your Canon EOS camera that clips in above the mirror! All normal functions of your EOS camera will be unaffected... focus, image stabilization, etc.