RE: ATM Building a Dobsonian, 2 Questions

["Scott Berfield" <sberfield@xbox.com>]

I use velvet opposite my focuser and paint elsewhere (I recommend Rosco
Super Saturated Velour Black). Velvet isn't a great solution for some
areas since it actually can be fairly reflective at low grazing angles.
I have had success as well with black flocking paper. Proper baffling
(in tube scopes) works a trick too. 

-sb

-----Original Message-----
From: owner-atm@shore.net [mailto:owner-atm@shore.net] On Behalf Of
Steven Hammond
Sent: Thursday, May 22, 2003 4:55 PM
To: ATM
Subject: ATM Building a Dobsonian, 2 Questions



Hi there,

    I've been lurking for a while and learning a lot. I'm finalizing my
plans for building my scope and I've got a couple questions. I'm making
an 8" f/6. I've ground, polished and figured the mirror; and it just got
back from being coated. Now, I'm working on the tube and mount.

1) I've heard that I should use adhesive backed black velvet on the
inside of the tube, but on the net I've found many references to
ultra-flat black paint. Is the velvet enough of an improvement to
justify the cost and effort to install?

2) I'm looking at using lazy susan hardware to facilitate a smooth
rotation instead of LP's or teflon. Has anybody tried this? See the link
below for details and specs.

 
http://www.rockler.com/ecom7/findprod.cfm?sku=2273&filter=18531&DID=6

Thanks,
Steve