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[QUOTE]Originally posted by xstream
The LPR/UHC is useless in a dark site it's made to screen out sodium and mercury vapour light emission only.
Sorry but LPR filters and UHC filters are not even closely related regardless of who makes them. A LPR filter is a broadband filter and not much better than useless for anything other than astrophotography where they do provide a benefit under light polluted skies. A UHC is a narrowband filter which I recommend for the person buying their 1st DSO filter, they work under semi light polluted to dark skies and offer an improvement on a large number of visual targets but remember filters really only improve the views on Planetary and Emission Nebula.
The Astronomiks UHC is very good as is the Lumicon UHC. If you wish to import the Orion Ultrablock from Canada that is also very good. The Meade and Celestron Filters are not quite as good as these. The Astronomiks OIII is a cracker but its not cheap and works on a lower number of targets than the Astronomiks UHC, but those it does work on it does amazing things.
To be honest I would forget about Celestron Filters because you pay too much for what you get. My prefrence is for the Astronomiks or Lumicon UHC or OIII and the Orion Ultrablock. DGM in the USA have a new filter which I have heard is sensational and very cheap (the DGM NPB Narrowband filter) but I have not used it.
CS - John B
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