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L-Extreme是一个两带滤波器,也是强烈抑制光污染的理想选择。它可以使O-III和H-Alpha线的狭窄频段排放物的物体远离城市。 特征 天文学的专业摄影过滤器 增强城市排放星云的照片 极端抑制光污染的理想选择 即使来自明亮的城市,也允许天文摄影 双波段滤波器具有较高的O-III + ...
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