Thought some on Ice in Space might like to know, along with their recently released 6nm Ha, OIII and SII filters, Astronomik have now released a new line of both Luminance and Deep-Sky RGB filters:
Luminance
Deep-Sky RGB
I have been using the Deep-Sky RGB filters in my last five images (see following link, latest at the top) and the new 6nm HaOIIISII set has been used in relevant images since the image of K1-22 The Southern Owl (except for New Lagoon version 2 which was composed from old data):
AG12 New Astronomik Filters
They look like goood'uns and particularly no troublesome halos are evident
Mike