[ATM] RE: ATM Laser Pointer

[rguinamard at infonie.fr (Raphaël Guinamard)]

I owe a green laser but I was hesitant to bring it at a star sparty.
If I point let say M1. Don't you think people that people who are making a
picture of M1 at the same time I'm pointing will get a picture with green
trail?
If not, I'll be glad to bring my laser !
Rapha?l Guinamard
----- Original Message -----
From: Shankland, CDR-Paul <CDR-Paul.Shankland@cnet.navy.mil>
To: <atm@atmlist.net>
Sent: Monday, February 16, 2004 3:39 AM
Subject: [ATM] RE: ATM Laser Pointer


> Happened to run across this thread looking for other "stuff"-
>
> let me add my 2Cents - for those naysayers who have not used a green laser
> as a finder or guider, don't speak ill til you know what you are saying -
I
> use mine with tremendous success on a 16" Bartels COT Dob in all sorts of
> "humidity" - and I use it WHILE I am using a KAF-1602E-CCD.... and unless
> you are sloppy - all is fine...
>
> It's the easiest of all unity finders I have ever used, it never causes
> miaging problems for me or neighbors, and it can be used for star parties
as
> well as guiding. Best thing since sliced bread-
>
> My 2 Cents- (and I don't own a green laser company...)
> Paul
>
> To: atm@shore.net
> Subject: Re: ATM Laser Pointer.
> From: "Dwight K. Elvey" <dwight.elvey@amd.com>
> Date: Fri, 31 Oct 2003 10:56:03 -0800 (PST)
> Reply-To: "Dwight K. Elvey" <dwight.elvey@amd.com>
> Sender: owner-atm@shore.net
>
> --------------------------------------------------------------------------
--
> ----
>
>
>
> >From: "Marco Miglionico" <marco.pm@btopenworld.com>
> >
> >Hello all,
> >
> >I may be exposing my ignorance, but how can a laser pointer be used as a
> >finder?
> >I am almost making reference to a gadget on in Nov. issue S&T that allows
> >you
> >to strap a pointer to your scope.
> >
> >The only thing I can think of  is that the beam of light refracts off
> >moisture/particles in the air and therefore exhibits a visible beam going
> >into the sky. However what I dont understand is how the beam can be used
as
> >a finder if you cannot look right
> >down the line of sight of the pointer. Am I therfore correct in my
> >assumption that
> >it can only be used as a rough guide? (or does the beam eventually hit
the
> >roof
> >of the world and create a spot there?)
> >
> >When replying, please feel free to use the words, dummy, idiot, etc
> etc...as
> >I am
> >obviously missing something.
> >
> >Marco Miglionico.
>
> Hi Marco
>  A little thought problem here. First, green and blue light
> reflect easily from small particals in the air. If you are within
> a few feet of the source, you can easily see the beam into sky.
>  Now consider that you have pointed a beam right at a star.
> If you move of to the side, the beams path is still ending
> at the star. It will look like there is a light path going
> to that same star, just like the path would end at an object close
> by if that was were you were pointing. The light beam doesn't
> move off the star just because you are off to the side, just
> as it doesn't move off to the side when the beam shines on a
> close object.
> Dwight
>
> _______________________________________________
> ATM mailing list http://www.atmlist.net/


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