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H-beta 濾鏡 2"

H-beta 濾鏡 2"

CN¥640.00
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Description

Optolong。H-beta 濾鏡 2"。窄帶光害濾鏡。在城市光害環境中,適合目視或攝影,線狀譜星雲,目視需搭配大口徑的望遠鏡用


目鏡端接口: 2"
用途: 專門為目視而設計的一款窄帶濾鏡,主要針對以 486nm(藍色)的線狀譜星雲,有濾除其他光的干擾,可以提高星雲的對比度。與 O-III 濾鏡類似,在目視的時候,為了可以看到足夠暗的星雲,需要保證足夠大的光通量,需搭配大口徑的望遠鏡而觀測,不建議使用小口徑的望遠鏡觀測
特色: 採用德國肖特優質光學玻璃,能夠有效的抑制光暈 (Halo) 出現
螺紋: N/A
厚度/重量: N/A
透光率: 允許譜線 486nm 波段透過

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