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echo: atm
to: ATM
from: mlt{at}ns.sympatico.ca
date: 2003-06-22 09:55:22
subject: Re: ATM guiding eyepiece

To: atm{at}shore.net
From: MLThiebaux 
Reply-To: MLThiebaux 


Etching lines on any transparent material placed in the focal plane is not
a good idea because all sorts of unsightly things eventually get deposited
on the surface.

I once made crosshairs from spider web strands. Black widow web seemed best
for strength and body.  At the time I happened to live in So. California
where these were found in great abundance among the geraniums.

This was before the days of LED's so a flashlight bulb dimmed almost to
extinction provided the teeny bit of illumination needed for guiding during
long exposures.

Martial Thiebaux
Rawdon Hills, Nova Scotia

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