GSO planetary filter 2 80A blue all astro filters opinie

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Planetary filter in a 2-inch metal frame. Color # 80A, i.e. blue. It can be attached to any 2 "eyepiece with a filter thread. It has a thread on both sides of the frame (filters can be combined in color combinations).


Read our guide about filters and their applications HERE

The connection of ALL astronomical filters, with the exception of solar foil filters (which are filters for the lens), is made by screwing the filter into the eyepiece frame from the side opposite to the eye you put in (i.e. from the side you put into the eyepiece extractor) ). Filters can be additionally joined together as they have threads on both sides of the housing.