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- To: owner-atm@shore.net
- Subject: BOUNCE atm@shore.net: Admin request
- From: owner-atm@shore.net
- Date: Fri, 11 Oct 1996 04:45:09 -0400 (EDT)
>From atm-owner Fri Oct 11 04:45:07 1996 Received: from smtp-gw01.ny.us.ibm.net (smtp-gw01.ny.us.ibm.net [165.87.194.252]) by relay1.shore.net (8.7.5/8.7.3) with SMTP id EAA17356 for <atm@shore.net>; Fri, 11 Oct 1996 04:45:07 -0400 (EDT) Received: (from uucp@localhost) by smtp-gw01.ny.us.ibm.net (8.6.9/8.6.9) id IAA170394 for <atm@shore.net>; Fri, 11 Oct 1996 08:45:06 GMT Received: from slip139-92-41-37.ut.nl.ibm.net(139.92.41.37) by smtp-gw01.ny.us.ibm.net via smap (V1.3mjr) id smaPzIHFW; Fri Oct 11 08:45:00 1996 From: behambu@ibm.net (Berthold Hamburger) To: atm@shore.net Subject: Re: ATM Cassegrain Date: Fri, 11 Oct 1996 08:44:46 GMT Reply-To: behambu@ibm.net Message-ID: <3260fe1c.1771386@smtp-gw01.ny.us.ibm.net> References: <9610102220.AA04933@mailhost.epa.ericsson.se> In-Reply-To: <9610102220.AA04933@mailhost.epa.ericsson.se> X-Mailer: Forte Agent .99f/16.299 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable On Fri, 11 Oct 96 08:20:52 EST, you wrote: > >> You're looking at a real challenge: twice as many mirrors, each of = which >> has to be twice as accurate - at least 4 times harder than a = Newtonian. >> The negative secondary is even worse than twice - you'll have to >> make a mirror just for testing it. There seems to be a tendency in the ATM world to have too much of respect for optical designs that require more skills than the grinding of one single moderate mirror. I don't see what can be frightening about taking up a project which is more demanding than the previous one, or to say it like Texereaux "only the timid worker will fail".=20 In my profession you constantly have to raise your standard and your skills. No Cellist can play all his life the same pieces on the same level. Each time you want to expand your skills, you have to challenge yourself. That, at least for me, is one of the most enriching aspects of Amateur telescope making, because your limits are only set by yourself and the amount of knowledge you acquire with each new step is tremendous. > >Don't see the point of making it as a small instrument, though. A 6" >f/longish Newtonian isn't that big, and it will make it VERY hard for >anything in this size to beat it. Once you pass the 12" region, >it starts to make sense having telescope which is not 3 or 4 meters >long. Hi Bratislav, I have several reasons to build a Cassegrain. - I want to do it :-) - I want to build a long F compact telescope that can later be used as a guide scope. (I don't think a three meter long newtonian telescope makes a very good guide scope :-)) How are things in Melbourne? You must be in middle of spring now. Aren't you? Berthold ------------------- Mag. Art. Berthold Hamburger - Cellist InterNet: behambu@ibm.net - IPhone: ESPHAMBU Homepage: http://www.geocities.com/Athens/4430
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