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H-α 12nm 濾鏡 1.25"

H-α 12nm 濾鏡 1.25"

CN¥520.00
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Description

Optolong1.25"。12nm 窄帶濾鏡,深空攝影,發射星雲,CCD專用

目鏡端接口: 1.25"
用途: 專門用於天文攝影中的窄帶濾鏡,極窄的帶寬只允許發射譜線 656nm波段透過,能夠有效的截止人造光鈉(Na)燈和汞(Hg)燈以及其他光的干擾,相比 7nm的H-Alpha,12nm濾鏡拍攝效率更高。使用濾鏡後,可以有效的增加目標天體與天空背景的對比度,再現星雲的豐富細節
類型/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
截止率/透光率: 允許發射譜線 656nm 波段透過

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