SVBONY SV115 O-III Narrowband Telescope Filter for Astronomy Glass 1.25 inch Surround Sound Systems and a flexible TPU back

and a flexible TPU back cover to protect against shocks

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SVBONY SV115 O-III Narrowband Telescope Filter for Astronomy Glass 1.25 inch Surround Sound Systems and a flexible TPU backThe SVBONY SV115 O III Narrowband Filter is designed for enhanced nebula observation in astronomy. This 1. 25 inch filter allows an 18nm bandwidth of light centered on 500nm, corresponding to OIII emission lines. It significantly reduces the transmission of artificial light pollution from sources like mercury vapor and sodium vapor lights, as well as natural skyglow, to improve contrast. Features: * Material: High grade optical glass with dichroic