Finger Lakes Instrumentation Research grade 50mm LRGB filter set (unmounted).
Quality equal to Astrodon, Astronomik or Baader filters, they will fit in any filterwheel that takes 50mm filters.
For full specifications and transmission curves see (RG 50D LRGB):
http://www.flicamera.com/fli/filters.html
Here they are listed at OPT:
http://www.optcorp.com/product.aspx?...I filters&st=2
They show no star halos or other spurious reflections sometimes seen in other brands.
FLI also offer matching Ha OIII and SII filters if you want to add to your imaging capabilities.
Like new condition - only starlight has passed through them,
In original packing pouches.
AU$500 including postage
Cheers
Mike Sidonio