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Giulio, my adventure began 17 years because he fascinated by astronomy and unfortunately dirt poor, a great motive to get busy, but only later I learned
However, if you do not do research or photos the newton is excellent at both long (today) in the very short focal, and I think it has the features to meet every need dell'astrofilo visualist…. if I want a photo, the discharge from NASA who can do better than I
hello Enzo, Milan is the calciosodico glass 25 mm, high-pressure cutting and chamfer chamfered edge, and also a historical company that has abrasives, if you go in person you can buy smaller quantities of classic bags 25 kg. grain from 24 to the 1500 , green silicon carbide. pure white to Corydon 99% from 24 to the 1200.
professional aluminizing, even for large diameters (1000mm diametro).I would do all warmest congratulations for this virtual space that allows all those who juggle or try to do it in this “Art” that sometimes borders on genius of the so-called coup c..lo, to find valuable information and now almost lost competence. Some amateurs who I met in my life, grattavetro almost always bizarre complained about this lack of interest and inability to pass on to future generations at least part of these skills, in this space I found by all the attempt to establish a school (albeit virtual), to donate their knowledge, commitment and enthusiasm. Of course we are far from a real school as proposed to its members for years stellafane, Here we lack the emotional and the physical presence of a tutor, but you are in a very good point!
Thirty years ago I met the engineer Luigi Ferioli, Optical and astronomer who wrote a little book entitled Saronno “astronomical optical clipboard”, the time if I'm not mistaken he was president of the Astronomical Association of Saronno, and founder of a remarkable ability grattavetro workshop lamented the difficulty of involving young people, let alone today! Well then this space that attracts those who are really interested in is lovingly encouraged and supported by all of you.hello Giulio, nice to see you again !!!!!
Euro’ soon need your skills to the control test since I have not yet figured out a pipe about managing foucault test, though I have read all the documents you produced!The unhealthy habit to scratch the glass in addition to bringing physical ailments also involves ( the long run) the grattalzaimer that is destructive!
Coming very serious, the aforementioned astrofilo has done work by a specialized company a steel disc with the desired surface curve, There has supported the glass from 1 metro 25 mm thick and then the whole has slipped in an oven at over 600 ° C until the glass is set on steel keeping the thickness at each point, cooling and annealing and machining with a tool of sucessiva 1300 mm in diameter aluminum generated by the same cutter to cnc. The processing is hand been made completely in two people on a suitable table, without any mechanism.
Glass pretty paltry price, the rest… bèh.
To support cell 27 points and cable
Saint Barthelemy was present
https://www.facebook.com/starpartysaintbarthelemy/photos/pb.416295208388009.-2207520000.1475077375./1466058480078338/?type=3&theaterHi Massimo, thanks for the trust. Recently I visited a grattavetro who made a dob of 1000 mm F5 and has built the hand mirror working as a normal calciosodico 25 mm hot preformed thickness of a steel mold to achieve the necessary curvature, but it took 7 years of work by hand to finish it….. I was amazed. Accurate construction and frame newton folded with three mirrors, obstruction 38%, I could not comment because the monster (In the true sense of the word)It was stored in a garage, but input for the future construction!
