Filtre H-Beta 25nm 1.25" - SVBONY autopostr_instagram_68716 Aperture: 70 mm

Aperture: 70 mm

Dimensions : 397 mm Quel modèle est inclus dans les éléments livrés

CPL filter allowing to eliminate polarization and improve contrast

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Filtre H-Beta 25nm 1.25" - SVBONY autopostr_instagram_68716 Aperture: 70 mmSV132 H Beta 25nm 1. 25 inch filter to reduce light pollution Designed for observing the Horsehead, California, and Cocoon nebulae with a moderate to large aperture telescope in dark skies. High precision optical polishing on both sides; the filter substrate is polished to 1 4 wave and <30 parallelism on both surfaces, preventing halos. High precision optical coatings improve transmission and cutoff depth; they offer over 90% transmission and