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DSLR photography (MC modified): Good when used with an additional IR-block filter
SETUP:Sky-Watcher 300 f / 4 on EQ8R-ProZWO ASI 294MM
These filters maintain optimal performance regardless of their orientation in the filter wheel
"mpn":"CERES-M"
the reducer/flatener features a 360-degree roation adapter
ZWO 2" SII 7nm Narrowband Filter ed doublet telescope DSLR photography (MC modified): GoodZWO 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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