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Old 11-10-2011, 09:04 PM
cristian abarca
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cristian abarca is offline
 
Join Date: Jun 2005
Location: Melbourne Vic
Posts: 290
Mirror makers

Hi guys Ive made a few mirrors/telescopes. My first mirror was an F7 Newtonian. For a first mirror it wasn't too bad it had a small turned down edge but it I used it successfully for a few years. I made a couple of others that never made it into telescopes. I've also tried to make a classical cassegrain that I could use as a fast Newtonian as well, just exchange the secondaries. The primary is an F4.55 and it is a good mirror. The secondary is still a work in progress. I'll get back to it sooner or later. I have a 16 inch plate glass blank which I'll make as practice run and then I'll make a 20 inch. I have a 20 inch Pyrex blank, but my next project is going to be a Lurie Haughton Newtonian. I will reuse the first mirror I made and turn it into an F4 mirror. I should use BK7 glass but as a trial I'll use plate glass for the 2 correctors. About 2 years ago Rod recommended I use plate glass for the correctors instead. I managed to get my hand on two 19 mm 10 inch blanks so I'll follow Rod's recommendation. If it works then I'll do it again with the BK7 glass.

Cristian
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