Orion 5587 1.25-Inch H-Alpha Extra-Narrowband Filter

Orion 5587 1.25-Inch H-Alpha Extra-Narrowband Filter

• Take high-contrast CCD images of emission nebulas in full moonlight or in extreme light pollution with this specialized extra narrowband h-alpha astrophotography filter
• Astrophotography filter provides 90% transmission at H-alpha line of 656.3nm and very narrow bandpass of 7nm
• Reveals subtle nebular details which are usually washed out by contrast-killing broadband light
• Also works great in conjunction with other filters for more advanced astrophotography techniques
• Astrophotography filter threads into standard 1.25" camera nosepiece, Orion Nautilus 1.25" Filter Wheel or Orion Multiple 1.25" Filter Wheel

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.