The 2 ZWO Duo-Band Filter passes light in the hydrogen-alpha (656.3nm) and O-III (500.7nm) wavelengths. It improves contrast and seeing for deep space objects such as emission nebulae and can be used to filter out moonlight or urban light pollution....

In stock
  • ShipAmount
  • $0.00
  • RevType
  • 2
  • Manufacturer
  • ZWO
  • Sku
  • ZWODB2
  • Identity
  • 36308727487

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