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Bi wavelength filter!
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05-03-2019, 02:21 PM
multiweb
(Marc)
ze frogginator
Join Date: Oct 2007
Location: Sydney
Posts: 22,062
Quote:
Originally Posted by
Merlin66
Logan,
The tight transmission curves at OIII and Ha shows it's much more than an UHC filter.
Correct. That's why the stars don't bloat after 700nm.
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