Lumicon Hydrogen - Beta Cassegrain Rear Cell
Item No. 735-20420
Eligible for Scope City Rewards at Check-out
Manuf. No. Lumicon LF3065
Hydrogen - Beta Cassegrain Rear Cell
The Horsehead Nebula filter. The Lumicon H-Beta Filter isolates only the hydrogen-beta line of the spectrum (486nm) in a narrow pass-band just 9 nm wide. The result is extreme contrast between the black background of space and the delicate Hydrogen - Beta emission of extended nebulae. Now you can view extremely faint, special objects such as the Horsehead, Cocoon and California Nebulae. In many cases, the Lumicon H-Beta Filter is the ONLY way to view these objects. A transparent sky, a 8" or larger telescope, and the Lumicon H-Beta Filter, will tremendously aid in viewing those "notch in the belt" objects. To ensure that your Lumicon filter remains the World's Best, the strictest quality control standards are employed throughout the production process. Each Lumicon Hydrogen - Beta Filter is individually inspected and proudly inscribed with the percentage of light transmittance of the primary emission lines.