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CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.
Dec 22 2009 10:03 AM | BillP in Eyepieces (3mm - 13mm)
As many are aware, the TMB Supermonocentric eyepieces had multiple runs by the factory. The 1st run eyepieces were not parafocal, while the subsequent runs were parafocal; and blackening and baffling were also improved in
Dec 17 2009 12:48 PM | BillP in Eyepieces (3mm - 13mm)
In late 2008, Explore Scientific also entered the ultra wide race with the Explore Scientific 82 Degree Series which then became available in the Spring of 2009. Hallmarks of this line include
Dec 17 2009 10:50 AM | John Noble in Eyepieces (3mm - 13mm)
Just to set things straight, the 10mm Axiom isn't made of Neutronium though it does feel like a solid billet of aluminum. There is some heft, but not the sort that causes a Dobsonian to emulate a medieval trebuchet if
Nov 06 2009 06:23 AM | BillP in Eyepieces (3mm - 13mm)
The Pentax 2.5mm and 5mm XO series of eyepieces ("O" for visual Observation) were released by Pentax for the 2003 Mars opposition event. Based on my research of public online archives and marketing releases, Pentax¡¦s optical design goals for the XO series were