Re: crosshairs
PFAFF2@delphi.com
Sat, 22 Apr 1995 00:55:23 -0400 (EDT)
> R
>
> >
> > I have used the glass fibers from a piece of fiberglass material.
> > If you seperate them you will get very fine fibers. The woven type
> > fiberglass seems to the finest fibers.
> > Bob Pfaff
>
> >
> > I've also tried pulling crosshairs from neoprene-base contact glue. With
> > a little practice it works fine, but the resulting fibres are way too thin
> > to be used in a wide-field finder scope eyepiece. They just can't be seen
> > against the sky background.
> >
> > Jaakko Oksa
> >
>
>
> There's really some great, innovative solutions to this problem. Almost
> makes me want to smash the old crosshairs to try some of these others!
> For filar micrometers you would not believe what a problem and pain
> crosshairs can be. This last is similar to the Duco Cement technique I
> mentioned. For micrometers though the finest crosshairs are what's
> needed. For a finderscope any of these seem like they would work. An
> advantage with the Duco Cement hairs is that they can be used like
> light pipes for illumination.
>
> -Rik
>
>
I have used glass fibers on a 6mm EP and they did not cover the stars.
I must admit it was not easy to glue them in this small EP.
The problem with cross hairs is they collect dust. I now only use
glass reticles which can be cleaned.
This brings up a question. Does anybody know what the commercial reticle
makers use to fill those etched lines so they can be illuminated by side
light? And if you do where do you find it?
So many telescopes sp little time
Bob Pfaff