Re: [ATM] Just starting out

["Norm Prince" <norman.prince@verizon.net>]

Re:> Hi,

.... very simple tools that do not require any substantial investment...can 
be used to make a telescope out of that 8" within better than +or - .25 of 
whatever your desired f/n....I would say.."hey! no sweat!...we can just 
build the other parts a little longer/shorter...etc"...at around f/6 on an 
8" chunk of glass we are talking ballpark 3/1000 of an inch between f/5.75 
and f/6 a whopping 2" in focal length.  I'm no expert at all..., but the 
only real reasons i can think of to make a newtonian telescope of an 
absolute "exact" f/n do not pertain to casual observation...you'll still 
wind up with a telescope better than the last one you built...no matter what 
focal length you shoot for.

Have fun...!!!,
-norm-


----- Original Message ----- 
From: "Gerald Clay" <gclay9999@yahoo.ca>
To: <atm@atmlist.net>
Sent: Wednesday, March 07, 2007 22:34 PM
Subject: [ATM] Just starting out


> Hi,
>
>    I'm awaiting my shipment of glass and grit kit from gotgrit.com.  Now 
> I've never done a mirror before and would like some suggestions.  I have 
> an 8" glass blank comming and can't decide what f value I should grind to. 
> Should I do the beginner f/6 like I keep reading or go with a different 
> value.  I want to be able to see the planets as clear as possible and do 
> deep sky as well.  I will eventually build a motorized setup for 
> astrophotography but for now it will be just for my daughter and I.  I 
> would like any and all input available.
>
> Thanks folks
> Gerald
>
> ---------------------------------
> Ask a question on any topic and get answers from real people. Go to Yahoo! 
> Answers.
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
> 


_______________________________________________
ATM mailing list http://www.atmlist.net/