Generally speaking, I find that the lumicon deep-Sky
filter is good for a few things...(1) Perking up
bright nebulous objects (M27, M57, M42, the Flame
Nebula) when the transparency suffers due primarily to
light as opposed to moisture or particulates; (2)
reflection nebulae in general; and (3) large bright
face-on galaxies such as M33 and M101. Neither this
nor any other LPR filters work well on typical "faint
fuzzy" galaxies, and they do not help considerably
when the atmosphere is really hazy.
In town, where nebulae are concerned, the Orion
Ultrablock is the best (for me) for general nebula
viewing, and the O-III helps on a few objects that
would typically respond to this high level of
filtration. The wideband DeepSky filter is not much
help here.
Bruce Jensen
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