Class: neutralDensityFilter
http://www.astro.umd.edu/~eshaya/astro-ont/owl/instruments.owl#neutralDensityFilter
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Thing
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filter
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opticalFilter
- neutralDensityFilter
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opticalFilter
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opticalComponent
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opticalFilter
- neutralDensityFilter
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opticalFilter
-
filter
Annotations
- label: "neutral density filter" (string)