%$$$ Revews 1.25" Orion H-Alpha Extra-Narrowband Filter

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Main Features : 1.25" Orion 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.