Thread: The Old Days
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Old 17-07-2005, 03:51 AM
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cometcatcher (Kevin)
<--- Comet Hale-Bopp

cometcatcher is offline
 
Join Date: Jan 2005
Location: Cloudy Mackay
Posts: 6,542
Okay, where will I start.. With pics I already have on the hard drive I suppose. Btw the hard drive is actually made from an old tape recorder and 20000 old floppy discs... er no it itsn't.

Okay, here's a 5 inch f7 and 7 inch f7.1 mirrors made from plate glass. The 7 inch seems to be figured very nicely but I have so many scopes now I haven't bothered to have it aluminised yet. I suppose in cave man tradition I should silver it.

The 5 inch is aluminised and finished but it has slight astigmatism. Still fine at low power though. Funny story about that. I became very lazy after making several mirrors so with the 5 inch I ground it on my TV table sitting down watching TV the whole time. Well, it's boring work grinding mirrors! I would rotate the tool and mirror but since I didn't move my lazy self around the mirror I guess that's how the astigmatism came about.
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