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Old 05-03-2019, 01:21 PM
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multiweb (Marc)
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Join Date: Oct 2007
Location: Hinchinbrook
Posts: 18,182
Originally Posted by Merlin66 View Post
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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