Quote:
Originally Posted by gregbradley
For what its worth my Astrodon 5nm S11 filter does not pass on much either. It seems S11 is generally the weakest of the 3 NB filters by a long way.
Greg.
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Indeed there isn't much there!
But having seen data from identical scopes with differing SII filters and having used 1.25" SII from CS, I'm suspecting all animals are not equal
