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![Filtro L-eNhance 2\" Optolong Ø48mm (2\")](https://www.artesky.it/img/cms/ARTESKY/55935462_1857280564375923_4030551160589910016_n.jpg "Filtro L-eNhance 2\\" Optolong Ø48mm (2\\")")
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![2020 NEW] Optolong L-eXtreme dual-band astronomy narrow band filter-Optolong Optics Co.,Ltd.](https://www.optolong.com/uploads/images/20200716/1840a8e24b716e2297a92bd4aa933ede.jpg "2020 NEW] Optolong L-eXtreme dual-band astronomy narrow band filter-Optolong Optics Co.,Ltd.")