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Orion 5583 Hydrogen-Beta Eyepiece Filter
From the Manufacturer Orion's Hydrogen-Beat eyepiece filter makes it possible to view the elusive Horsehead, California, and Cocoon Nebulas in dark skies. Selective band-pass filter transmits only the hydrogen-beta light these faint nebulas emit. Filter allows you to observe targets that are considered trophies of visual astronomy. Best used with a moderate to large aperture telescope and clear, dark skies. Threaded to fit 1.25 eyepieces and threaded diagonal barrels Orion's Hydrogen-Beta eyepiece filter makes it possible to view the elusive Horsehead, California, and Cocoon Nebulas in dark skies Selective band-pass filter transmits only the hydrogen-beta light these faint nebulas emit Filter

Price is $90.00
Price: $89.99