Re: ATM Astgma(tism)

["Scott Ewart" <scott.e@quicksurfer.com>]

That someone was right, you should see it best at high, or very high power.
If you're seeing it at such low power, it's probably not your primary.  It
sounds more like your eyes, but if you say rotating just your head had no
effect, then I don't know what to suggest.  But the test for astigmatism
should be done at high power.

Scott Ewart


----- Original Message -----
From: "Rick Maillet" <bucko_62@yahoo.com>
To: <atm@shore.net>
Sent: Saturday, October 11, 2003 3:15 PM
Subject: ATM Astgma


|
| Well after doing some test lastnight, I believe there
| is a definite astigma in my system,not sure how bad
| because I have never seen it before but it flares out
| like a line just before and just after focus,and the
| swing is about 90 degrees....(someone said it gets
| worse with more power, but i find it harder to notice
| with more power, best noticed with the 20mm
| eyepiece)....seeing as it was not there before I tried
| turning the eyepiece, turning my position at the
| eyepiece and switching eyes, all with the same
| results.... no change.
| so today I removed the mirror and rotated it 90
| degrees, so tonight I will know if it is the primary
| or not.I also left the retainer clips plenty slack so
| they will not be in the equation.
| down to two pieces of the optical train, the mirror or
| the diagonal, they both are in new mounts so maybe I
| goofed up on a mount somehow.
| Will let  you know results tonight.
|                                                      Rick
|
| =====
| Keep looking up,You just may see something interesting.
|



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