Lumicon H-Beta Telescope Filter collections

Product Name: Lumicon H-Beta Telescope Filter collections
Lumicon H-Beta Telescope Filter Lumicon 2” Hydrogen Beta (H-Beta) Filter Isolates Only The Hydrogen-Beta Line Of The Spectrum (486nm) In Narrow Pass-Band Just 9mm Wide Providing Maximum Contrast, Which Allows You To View Extremely Faint Nebulous Objects Such As The Horsehead, Cocoon, And California Nebulae This Filter Is Often The Only Way To View These Objects Recommended For 12” Or Larger Telescopes Sticker On collections Case Reads “H-Beta Line Filter, “Horsehead Nebula Filter”, Lumicon, 2111 Research Dr. #5, Livermore, CA, 94550” Sticker On Back Reads: “Nebula Line Transmission % Oxygen-III 496nm Oxygen-III 501nm Hydrogen-Beta 486nm 92” Perfect For Viewing Extremely Faint Nebulous Objects! Comes In Original Case And In Excellent Condition! See My Other Listings For More Lumicon Filters!.