Re: ATM Collimation tool

["Vero and Lisa Joseph" <joseph@interact.net.au>]

Balaya
With my film can collimator I used sticky tape wrapped outside the can to
hold the cross-hairs (yes they were cross when I pulled them out) in place.
In order to keep the cross in focus, pull your eye 15cm or so away from the
hole.

Vero Joseph
Goulburn NSW Australia
(Too bad the moon is spoiling the seeing)

----- Original Message -----
From: Ashish, Balaya (IE10) <ABalaya@meghadoot.hiso.honeywell.com>
To: atm <atm@shore.net>
Sent: Tuesday, July 20, 1999 10:13 PM
Subject: ATM Collimation tool


>
> Hi everyone,
>     I've made a collimation tool from a photo film can and this one has
> cross wires. The problem is that the hole in the can is in the bottom of
the
> can, and the cross wires towards the open end (where I had to slice off
the
> small flange that holds the lid). Now when I peer through the hole in the
> bottom, the cross wires are out of focus. Of course I can still make our
> their interesection, but is this how its supposed to be? So far I've only
> looked through it out into the open, haven't really used it on the 'scope
> because its lousy, rainy weather here and I haven't had the chance to try.
>
>    Am I doing it right? So far I'd got OK collimation without the cross
> wires but thought I'll go for a better setup with cross wires; mind you, I
> still haven't found a way to keep the wires taut while the glue sticks so
> they're a bit limp (any ideas?). I'm just using sewing thread for this
first
> attempt.
>
> Clear skies,
> balaya
>