Message Font: Serif | Sans-Serif
 
UnThreaded | Threaded | Whole Thread (11) | Ignore Thread Prev Thread | Prev | Next | Next Thread
Author: rodgpetersen Add to my Favorite Fools Ignore this person (you won't see their posts anymore) Number: of 1797  
Subject: Re: Telescope talk Date: 6/28/2002 3:16 PM
Post New | Post Reply | Reply Later | Create Poll . Report this Post | Recommend it!
Recommendations: 1
O couple of things to keep in mind...

Fast scopes ( low F# ) are very difficult to figure, so your average commercial F4 is going to be a fairly crude mirror, good for low power sweeping and with a VERY good mount, astrophotography. Collimation is going to be a rip-snorter, especially for newbies.

I haven't seen any reccomendations to "roll your own". Here's one. Your first mirror, with a bit of patience, is going to be an order of magnitude better than popularly priced commercial mirrors. You can make a nice 8" dob using excellent parts (something commercial scopes seldom have) for a couple hundred dollars. With a bit of patience, a first mirror can fairly easily be 1/10th wave, most commercial stuff tests out at 1/2 to 1/4 wave and a lot of us have tested mirrors for unhappy owners with over 1 wavelenght of error.

Here it comes, make yourself a nice little 6"F8 or 8"F7 dob, easy to make, easy to use, both will fulfill a lifetime of viewing.
Rodg in Bellevue
Post New | Post Reply | Reply Later | Create Poll . Report this Post | Recommend it!
Print the post  
UnThreaded | Threaded | Whole Thread (11) | Ignore Thread Prev Thread | Prev | Next | Next Thread

Announcements

What was Your Dumbest Investment?
Share it with us -- and learn from others' stories of flubs.
When Life Gives You Lemons
We all have had hardships and made poor decisions. The important thing is how we respond and grow. Read the story of a Fool who started from nothing, and looks to gain everything.
Community Home
Speak Your Mind, Start Your Blog, Rate Your Stocks

Community Team Fools - who are those TMF's?
Contact Us
Contact Customer Service and other Fool departments here.
Work for Fools?
Winner of the Washingtonian great places to work, and "#1 Media Company to Work For" (BusinessInsider 2011)! Have access to all of TMF's online and email products for FREE, and be paid for your contributions to TMF! Click the link and start your Fool career.
Advertisement