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Killer NGC 891, soon all images will be that good!
----- Original Message -----
Sent: Tuesday, October 09, 2001 9:57
PM
Subject: Re: [APML] A long time lurker -
Finally sharing some of my astrophotos...
steve banbury wrote:
> Hi Mike--I really enjoyed
seeing your images. Maybe there are some things to work on, but I was
>
blown away by the absence of trailing on exposures of 2 hours! Your polar
alignment technique must
> be very good. And it looks like you've tried
every film known to mankind!
Thanks for the compliment!
I do
spend some time on polar alignment before each session. I have found
that using my STV really
aid in getting a quick and very accurate polar
alignment. Basically, I place the STV head in the
tube and get it
roughly aligned to the RA and DEC axis. I then do a standard drift
alignment using
the "Drive Accuracy" function of the STV. If the tube
is nearly polar aligned (using the polar
scope), the STV's graphs will show
most of the error in one axis (depending if the tube is pointed
East or
South). I simply adjust Alt/Az until the graph shows little to no
error. I usually go back
and forth between east and south two or
three times... Periodic error will show up, so it pays to
wait a few
minutes to determine if it is drift or
PE.
Mike
>
>
> Keep up the good
work!
>
> SteveB
>
> Michael Greger
wrote:
>
> > I have been a long time observer... It is
finally time to share some of
> > my photos :)
>
>
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Michael
J
Greger
Intel Corporation
mgreger@dashmail.net
Intel Server Chipset Design Engineer
http://www.geocities.com/mjgreger0
These are my opinions, not those of
Intel!
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