Try this thread on IIS:
http://www.iceinspace.com.au/forum/s...d.php?t=117915
Then, for recommendations on types for each nebula, see:
http://www.prairieastronomyclub.org/...ommon-nebulae/
Some recommended brands (in order):
Narrowband: DGM NPB, Lumicon UHC, Orion Ultrablock, Thousand oaks LP2
O-III: Lumicon, Orion
H-Beta: Lumicon, Thousand Oaks LP4
Broadband: Lumicon, Orion