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john
I have just digested what was on the web site. I will have to do a lot of comparing and pricing before I make that decision. A wonderful option and very honerable, but i am just fishing for practical advice and not get burnt buying a useless filter. the infor from their web site is below. What's it all mean?
The Narrow Pass Band (NPB) filter
The NPB filter is an Ultra High Contrast type of filter that is very effective for small and fainter emission planetary and nebula
and a variety of bright nebula, especially through larger scopes. High TX% at the 656.3nm Hydrogen Alpha emission line is
a bonus for this design. Noted optical consultant Mike Palermiti conducted a blind test with the NPB Nebula filter and UHC type filters made by 4 well-known manufacturers and 15 participants with varying degrees of observing experience. Every one
of the participants preferred the NPB over the 4 leading UHC type filter manufacturers samples used in the comparison.
On Sale !!!
Regularly $79.95 (1.25”) Now just $54.95
$149.95 (2.0”) Now just $104.95
(Prices include S&H within the USA)
Order The NPB Filter
Last edited by h0ughy; 17-05-2005 at 10:47 PM.
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