| |
[index]
[month]
[prev]
[next]
[thread-next]
Subject: [M]: Field flattener and re-collimation
From: Dr. Michael Blaber
Reply To: mapug@shore.net
Date: Sat Feb 24 10:42:43 2001
|
While you're here, how about checking out the
Astronomy Book
List ? |
This is a multi-part message in MIME format.
------=_NextPart_000_0025_01C09E5F.483E5460
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Colleagues
I have a question about whether it is necessary or expected to =
recollimate when using a field flattener. I star-tested and collimated =
my LX-200 and it looked superb. However, after installing the Meade =
f6.3 field flattener, and looking at the out of focus diffraction =
pattern, it was clearly no longer collimated. Should this be expected? =
Can the field flattener affect the collimation like this? Is is =
expected the you will need to recollimate upon installing the field =
flattener?
thanks
Mike
------=_NextPart_000_0025_01C09E5F.483E5460
Content-Type: text/html;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN">
<HTML>
<HEAD>
<META content=3Dtext/html;charset=3Diso-8859-1 =
http-equiv=3DContent-Type>
<META content=3D'"MSHTML 4.72.3110.7"' name=3DGENERATOR>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Colleagues</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I have a question about whether it is =
necessary or=20
expected to recollimate when using a field flattener. I =
star-tested and=20
collimated my LX-200 and it looked superb. However, after =
installing the=20
Meade f6.3 field flattener, and looking at the out of focus diffraction =
pattern,=20
it was clearly no longer collimated. Should this be =
expected? Can=20
the field flattener affect the collimation like this? Is is =
expected the=20
you will need to recollimate upon installing the field =
flattener?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>thanks</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Mike</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV></BODY></HTML>
------=_NextPart_000_0025_01C09E5F.483E5460--
View index by [date] [author] [subject]
Previous message: Re: [M]: New back plate for LX scopes, Scott
Next message: Re: [M]: LX200: Continual use questions., Gary Giddings
Next message in thread: Re: [M]: Field flattener and re-collimation, R. A. Greiner
|
|