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Old 09-11-2018, 04:42 PM
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Merlin66 (Ken)
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Merlin66 is offline
 
Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,904
Bi wavelength filter!

https://www.cyclopsoptics.com/astron...d-filter-48mm/

Appears to give good filtering and suppression of background lighting.
Would need an OSC camera to separate and process the OIII and Ha images.
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