Re: ATM Shroud Extensions and Light Baffles?

[Brian Nestel <blast@aloha.net>]

_____K1JJ@aol.com wrote:

> adding a three foot long aluminum cylinder to the end of the
> Newtonian....(roughed up inside and painted flat black. Any opinions whether
> or not this "shroud" also needs baffling??? 

The Shroud wouldn't need baffling, You usually put baffling closer to
the
primary in a newt.
> 
> I see them used a lot on the Meades and Celestron riceboxes all the time but
> am not sure what the reasons are....Is it simply to give a little more light
> shrouding from "local"  light pollution, that's it?

The extension keeps stray light out and on a SCT "ricebox" also serves
the purpose of keeping dew off the corrector plate.
There is a good article on baffling a newt in the Sept. issue of 
Astronomy.
Aloha
Brian
_________________________________________________________
|         NESCOMP         |          K.E.A.S.A.         |      
|    Computer Services    |Kauai Educational Association| 
| Box 73, Lawai, HI 96765 |  for Science and Astronomy  |          
| Voice/Fax 808-332-7709  |  Box 161, Waimea, HI 96796  |

    "The only one who got everything done by Friday
     was Robinson Crusoe"