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Ships within 48 hours · Estimated delivery Aug 22 - Aug 27
spec-table td {border:1px solid #ddd
high-quality filter box
Super penetrating power
No halos and no internal reflections
ZWO 2" SII 7nm Narrowband Filter Restaurant Equipment spec-table td {border:1px solid #dddZWO 2" SII 7nm Narrowband Filter (Since mid 2018 ZWO supplies a new, improved version of their narrowband filters. The difference is visible when shooting night sky "landscapes" with very bright stars in the field of view, especially with the H alpha and SII filters, the difference is very very subtle when using the new OIII filters Production of the 2" version started in the end of 2019, so it has ever been only available in the improved version,
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