TimC, TomT,TomW,JerryW,JoeD
-Javier gave TimC a donated 8” polished pyrex glass, with the requirement that someone reports on the final product telescope back to the donator. TimC brought this in tonight and TomT took photos of the glass, Edmunds rouge, pitched tool for polishing, and some extra. Mirror measured to be a f/8 with the Ronchi test showing a good pattern?
-JerryW patiently explained focal radius vs focal length to TomT. Also mirror types for various types of cassegrain telescopes.
-JoeD 6” brought in his $300 astro-tech newtonian F/4 mirror, which measured to about F3.9 on TomW testing setup and surfaces were viewed with Ronchi and knife edge.
-TomW measuring his two 6” glasses, one is R-87” f/7, the other is f/4, and examining the surfaces with Ronchi testing, perhaps a tad high center on the second? with the pinched center of the Ronchi pattern.
-TimC grinding his 16” w 120 grit still, JerryW spherocity tester shows it very good already.
-Finally TomW 10” F3.3 was viewed and it was almost perfect for the Ronchi pattern.
-TomT took off at 9pm to go see the outreach at UCSB Ucen...it was very busy there with students.
Photos available soon here for both the TW and outreach:
http://www.flickr.com/photos/27241501@N03/sets/72157633980863507/with/8975222139/
Potluck this Friday.
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