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Baader O-III Ultra-Narrowband-Filters (4nm) – CMOS-optimized - (Ultra-) Narrowband / Highspeed - Filters
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Svbony SV160 Filtro Telescopio 2inch Stretta-banda Filtro 7nm OIII-CCD Profondo Cielo Filtro Inquinamento Luminoso Filtro per Cielo Profondo Osservazione Astronomica : Amazon.it: Elettronica
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