Orion 1.25" Hydrogen-Alpha Extra Narrowband Filter with 90% Transmission

The Orion 1.25" Hydrogen-Alpha Extra Narrowband Filter allows to capture brilliant, high-contrast images of nebulas in full moonlight or in the thick of downtown light pollution. Designed exclusively for deep-sky imaging of emission nebulas with CCD cameras, this high-performance filter transmits 90 percent of light at the hydrogen-alpha line of 656.3nm and has a very narrow full width at half-maximum (FWHM) bandpass of 7nm.

It blocks out all other light, including artificial light pollution and moonlight. It also blocks infrared (IR) light. The result is a dramatic boost in contrast, revealing subtle nebular details that are usually washed out by contrast-killing broadband light. Stars come out tight and sharp. This filter is also ideal for capturing luminance data for LRGB color imaging of hydrogen-alpha emission nebulae with monochrome imagers, such as the Orion StarShoot Deep Space Monochrome Imager II. When the monochromatic H-alpha image is combined with the exposures taken through red, green and blue filters, the resulting color image teems with fine details that are "missing in action" in a standard color shot.

The Orion H-alpha Extra Narrowband imaging filter is the perfect accessory for the StarShoot Deep Space Monochrome Imager II. The 1.25"-diameter filter threads into the nosepiece of the camera or the Multiple Filter Wheel.