FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. They offer a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.

The Optolong H-Alpha 7nm is an very narrow emission-line filter that works by permitting a 7nm bandwidth of light, fixated on the 656nm wavelength through, and blocking the transmission of contrast killing wavelengths of light pollution.

The Optolong H-Alpha 7nm is a very narrow emission-line filter that works by permitting a 7nm bandwidth of light, focused on the 656nm wavelength through, and blocking the transmission of contrast-killing light pollution wavelengths.

The Optolong H-Alpha 12nm Narrowband Filter works by permitting a 12nm light bandwidth, focused on the 656nm wavelength through, and hindering the transmission of contrast-killing light pollution wavelengths.

The Optolong H-Alpha 7nm is a very narrow emission-line filter that functions by permitting a 7nm light bandwidth, focused on the 656nm wavelength through, and obstructing the transmission of contrast-killing light-pollution wavelengths.

The Optolong H-Alpha 7nm is an very narrow emission-line filter that works by permitting a 7nm bandwidth of light, fixated on the 656nm wavelength through, and blocking the transmission of contrast killing wavelengths of light pollution.

The Optolong H-Alpha 12nm Narrowband Filter works by permitting a 12nm light bandwidth, focused on the 656nm wavelength through, and hindering the transmission of contrast-killing light pollution wavelengths.

The Optolong H-Alpha 7nm is a very narrow emission-line filter that works by permitting a 7nm bandwidth of light, focused on the 656nm wavelength through, and blocking the transmission of contrast-killing light pollution wavelengths.

The Optolong H-Alpha 7nm is a very narrow emission-line filter that functions by permitting a 7nm light bandwidth, focused on the 656nm wavelength through, and obstructing the transmission of contrast-killing light-pollution wavelengths.

The Optolong H-Alpha 12nm Narrowband Filter works by allowing a 12nm bandwidth of light, centered on the 656nm wavelength through, and blocking the transmission of contrast-killing light pollution wavelengths.

The Optolong H-Alpha 12nm Narrowband Filter works by allowing a 12nm bandwidth of light, centered on the 656nm wavelength through, and blocking the transmission of contrast-killing light pollution wavelengths.

The Optolong H-Alpha 12nm Narrowband Filter works by permitting a 12nm light bandwidth, focused on the 656nm wavelength through, and hindering the transmission of contrast-killing light pollution wavelengths.

The Optolong Night Sky H-Alpha filter, or IR-Pass 650nm channel, can be utilized for imaging of the Moon, planets and deep sky objects that emit H-alpha wavelengths.

The Optolong Night Sky H-Alpha filter, or IR-Pass 650nm channel, can be utilized for imaging of the Moon, planets and deep sky objects that emit H-alpha wavelengths.

The Optolong H-Alpha 12nm Narrowband Filter works by permitting a 12nm bandwidth of light, fixated on the 656nm wavelength through, and blocking the transmission of contrast-killing light pollution wavelengths.

The Optolong H-Alpha 12nm Narrowband Filter works by permitting a 12nm bandwidth of light, fixated on the 656nm wavelength through, and blocking the transmission of contrast-killing light pollution wavelengths.

Get Great Nebula Images Under City Lights or a Full Moon with the Orion Hydrogen-Alpha Extra Narrowband Astrophotography Filter!

The Optolong H-Alpha 12nm Narrowband Filter works by permitting a 12nm light bandwidth, focused on the 656nm wavelength through, and hindering the transmission of contrast-killing light pollution wavelengths.

The Optolong H-Alpha 7nm is a very narrow emission-line filter that works by permitting a 7nm bandwidth of light, focused on the 656nm wavelength through, and blocking the transmission of contrast-killing light pollution wavelengths.

FLI high transmission filters are manufactured in the United States with the highest quality fabrication techniques available. They offer a full line of filter types and sizes. Complete sets are available as well as individual filters in both round and square shapes.