For those who are interested, I will be receiving a sample filter from DGM
Optics soon - perhaps by this Friday.
Here is a web-page with pertinent info:
http://users.erols.com/dgmoptics/LPRfilters.htm
Anyone wishing to try it in their telescope will be welcome to do so. I'll
have the 2" version. I'll be bringing to such places as Houge Park, Coe,
wherever I go in the Sierra foothills, and of course to SSP.
Mark