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nebular filter

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It refers to the filter lens used for observing nebula with astronomical telescope
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Nebula filter Astronomical telescope A filter lens for observing nebulae.
Chinese name
nebular filter
Type
Lens
Nebula filter can be divided into narrowband filter, O-III (double ionized oxygen) filter and H - β (hydrogen - β) filter. When observing objects that are not nebulae, it is better not to use nebulae filters.
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