RE: ATM FOCAL PLANE FOUND - THANKS

["(RIA) Durkin, Kenneth M" <k.durkin@state.gov>]

Thanks.  I'll be chary of that.  Learning all kinds of great stuff on this
project.  Ken

> -----Original Message-----
> From: Anthony Stillman [SMTP:atmer@flash.net]
> Sent: Monday, August 21, 2000 4:36 PM
> To:   (RIA) Durkin, Kenneth M
> Cc:   atm@shore.net
> Subject:      Re: ATM FOCAL PLANE FOUND - THANKS
> 
> 
> >The focal plane may, just may, be too far...
> >...is it also possible to...mak(e) the focuser longer?
> 
> 
> Ken,
> 
> I've never actually added a premanent focuser extention. An empty Barlow
> tube works well for this.  For quick and dirty cardboard tubing and tape
> or
> just pulling the eyepiece out as far as possible.  My concen with designs
> that use long draw tubes is the pontential for clipping the light cone at
> the other end.  To minimize obstruction I've often pushed it the other
> way.
> Before commertial low profile focusers were avalible I would take a
> hacksaw
> to what I could buy.
> 
> http://home.earthlink.net/~flyj/designns5.html  will tell you if your draw
> tube may clip the light cone, but to actually see whats going on you'll
> have to run the number yourself.
> 
> 
> 
> 
> >...my wife refused to let me (work) in the living room.
> 
> My X-wife refused to let me attend RTMC.
> 
> Anthony
> 
>