ICEINSPACE
Most Read Articles
Moon Phase
CURRENT MOON Waning Crescent
6.5%
The Sun Now
Time Zones
Sydney*
1:08 am
Perth
10:08 pm
Auckland*
3:08 am
New York
9:08 am
Paris
3:08 pm
GMT
2:08 pm




Go Back   IceInSpace > Beginners Start Here > Beginners Talk

Reply
 
Thread Tools Rating: Thread Rating: 5 votes, 2.60 average.
  #1  
Old 18-07-2008, 06:00 AM
iceman's Avatar
iceman (Mike)
Sir Post a Lot!

iceman is offline
 
Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,684
Article: Basic Setup Procedure for a German Equatorial Mount (GEM) Telescope

Hi all

Trevor Hand (OneOfOne) has written a fantastic article, perfect for beginners, Basic Setup Procedure for a German Equatorial Mount (GEM) Telescope.

You can read the article from the IceInSpace Projects and Articles page, or directly from the link below:

Basic Setup Procedure for a German Equatorial Mount (GEM) Telescope

Thanks to Trevor for writing the article.

If you'd like to submit an article or other content to IceInSpace, please Contact Me.

Last edited by iceman; 22-07-2008 at 05:52 AM.
Reply With Quote
  #2  
Old 22-07-2008, 05:52 AM
iceman's Avatar
iceman (Mike)
Sir Post a Lot!

iceman is offline
 
Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,684
Article uploaded and this thread stickied.
Reply With Quote
  #3  
Old 12-08-2008, 06:30 PM
Michael V's Avatar
Michael V
Tinkerer

Michael V is offline
 
Join Date: Mar 2008
Location: Kellyville NSW
Posts: 16
G'day Trevor,
May i congratulate you on your article. You have gone to a lot of effort, it all makes really good sense, and the pictures with their notations are really excellent.

Michael
Reply With Quote
  #4  
Old 12-08-2008, 06:52 PM
dannat's Avatar
dannat (Daniel)
daniel

dannat is offline
 
Join Date: Sep 2007
Location: Macedon shire, Australia
Posts: 3,334
looks terrific, well done trevor
Reply With Quote
  #5  
Old 17-08-2008, 08:53 PM
Jeff's Avatar
Jeff
Starry Eyed

Jeff is offline
 
Join Date: Dec 2007
Location: Wonga Park
Posts: 534
Great work Trevor, well explained and excellent pics/diagrams.

Cheers,
Jeff
Reply With Quote
  #6  
Old 20-12-2008, 11:51 AM
HarryD (Greg)
Registered User

HarryD is offline
 
Join Date: Dec 2008
Location: Sydney
Posts: 107
Thanks Trevor

You have a knack of making the difficult seem so easy. This sort of info sure makes a new GEM owner feel more relaxed about their purchase.

Merry Christmas to you all.
Reply With Quote
  #7  
Old 14-01-2009, 04:07 PM
telecasterguru's Avatar
telecasterguru (Frank)
Have scope will travel!

telecasterguru is offline
 
Join Date: Jan 2009
Location: Sydney NSW
Posts: 1,450
Thanks for the great article. As a learner since given a little refractor with GEM for Christmas this article was invaluable to explain how to set up the mount but also why it is set up that way. I was totally confused as to why the south celestial pole was so important and now I understand.

Frank
Telecasterguru
Reply With Quote
  #8  
Old 16-01-2009, 05:13 PM
lacad01's Avatar
lacad01 (Adam)
The sky is Messier here!

lacad01 is offline
 
Join Date: Sep 2007
Location: Sydney, Aus
Posts: 2,586
Great article! Will be picking up my new EQ6 tomorrow so this will definitely come in handy getting oriented
Reply With Quote
  #9  
Old 20-08-2009, 12:57 AM
clem
Registered User

clem is offline
 
Join Date: Aug 2009
Location: Gold Coast, Australia
Posts: 23
I have tried and tried, but I can't get alignment right. I did the compass, I have calibrated the mount, I compensated for true south, I tweaked my latitude, and still, I couldn't get accurate alignment. First star is off the center of my finderscope, then the second star is way off, third one I couldn't see at all. What am I doing wrong? Is it me or is it the mount (EQ3-2) or the Synscan goto system? Heelp!!!
Reply With Quote
  #10  
Old 20-08-2009, 06:44 AM
OneOfOne's Avatar
OneOfOne (Trevor)
Meteor & fossil collector

OneOfOne is offline
 
Join Date: Jul 2005
Location: Bentleigh
Posts: 1,386
You may want to post a new thread in the beginners area. This will bring it to the attention of people better, most may think your question is about the article than your alignment problems.

Unfortunately, you are not in Melbourne or I might be able to have a look. One thing that I have done myself, , on a couple of occasions is to plug the RA and Dec cables into the wrong sockets, have you checked these? The alignment goes absolutely nuts as you can imagine. My scope also goes nuts if the battery is almost flat, I doubt this is your problem though.
Reply With Quote
  #11  
Old 22-05-2010, 08:55 PM
John45's Avatar
John45 (John)
Registered User

John45 is offline
 
Join Date: May 2010
Location: Mount Gambier
Posts: 11
Thankyou so much for this article. Being new to astronomy, I know that a good quality mount is very important, so I have just bought a Losmandy G8 and this explains absolutely everything that is required to set it up.
Reply With Quote
  #12  
Old 10-07-2010, 04:04 PM
Mutley's Avatar
Mutley (Paul)
Registered User

Mutley is offline
 
Join Date: May 2010
Location: Perth
Posts: 8
Thank you for this, My instruction manual that came with my scope might as well been written in Hungarian! This helped me out no end. Top article. Many Thanks
Reply With Quote
  #13  
Old 31-01-2011, 01:24 AM
mongol01 (Tim)
Registered User

mongol01 is offline
 
Join Date: Dec 2010
Location: Tara Queensland Australia
Posts: 3
Thanks,but need a little more

Thanks to Trevor for such an in depth article for someone like me who has just purchased an ebay scope with a GEM. Unfortunately seeing has not been good since I received it, but still trying to get the thing adjusted and oriented properly. I have twiddled everything on the scope, the RA dial turns too. Must be able to calibrate it or something? I had set the Lat for Brisbane, I live about the same Lat, but west. The scale for Lat is that fine that I would be hard pressed to get within 1 deg. anyway. Could someone please explain to me about setting the RA? Very useful site, many thanks. Come on sigma octans! will find you soon.
Reply With Quote
  #14  
Old 04-03-2011, 07:32 PM
mongol01 (Tim)
Registered User

mongol01 is offline
 
Join Date: Dec 2010
Location: Tara Queensland Australia
Posts: 3
Many thanks to MangroveDutch for his advice re
gem setup. I feel I asked something reallly stupid. Will try youtube for more help.
Reply With Quote
  #15  
Old 01-02-2012, 09:02 PM
Brisbane (Joe)
Registered User

Brisbane is offline
 
Join Date: Jan 2012
Location: Brisbane Australia
Posts: 5
very informative Trevor,

saved to my favorites, user friendly and great pics/diagrams. I wish I had seen this a few years ago I would have spent more time viewing.

Joe
Reply With Quote
  #16  
Old 15-07-2012, 05:51 PM
ourkind's Avatar
ourkind (Carlos)
There is no substitute

ourkind is offline
 
Join Date: Jul 2012
Location: Sydney
Posts: 1,962
This article should be included as a suppliment in all GEM packages!!

Thanks it was very helpful!!

Reply With Quote
  #17  
Old 09-03-2013, 07:28 PM
Douvie's Avatar
Douvie (John)
Registered User

Douvie is offline
 
Join Date: Mar 2013
Location: Kyneton, Vic, Australia
Posts: 2
Thanks Trevor,

I have a lot of reading to do. The documentation that came with my scope is confusing, and even more difficult to understand if one is a noob. At least your how-to explains the important details.
Reply With Quote
  #18  
Old 10-03-2013, 11:42 AM
brian nordstrom's Avatar
brian nordstrom (As avatar)
Registered User

brian nordstrom is offline
 
Join Date: Apr 2007
Location: Perth WA
Posts: 3,981
Thanks for your time and effort Trevor , a great artical .
Brian.
Reply With Quote
  #19  
Old 19-03-2014, 12:19 AM
julianh72 (Julian)
Registered User

julianh72 is offline
 
Join Date: Jan 2014
Location: Kelvin Grove
Posts: 1,052
Handy tool for aligning your GEM (And you've probably got one in your pocket!)

At the risk of stating the obvious (and apologies if this has been mentioned numerous times before), I thought I would remind people that they probably own a really handy tool to help get a reasonably good visual polar alignment for their GEM mount, and they probably carry it with them everywhere they go.

It's your smartphone.

Pretty well all modern smartphones have a compass and inclinometer built-in - all you need is a suitable app to access the data. I use the "Smart Tools" app on an Android phone, but there are numerous similar apps on most smartphone platforms.

Here's how I do it:

Set up the tripod at the desired location. If your tripod doesn't have a spirit level bubble built in, lay your smartphone on the tripod platen, screen facing up, and use the spirit level app to get the platen as horizontal as practical.

Now install the GEM mount and counterweight, and put the scope on the GEM. Use the altitude dial scale to set the altitude of the GEM RA axis to approximately match your latitude, and point the GEM approximately south. Align the telescope tube to be parallel to the GEM RA axis, so that it is pointing approximately at the south celestial pole (where the GEM is pointing).

I now place my phone on top of the tube, screen facing up, and long sides parallel to the tube axis. My phone has a rubberized case back, and my finder-scope mounting bracket stops the phone from sliding off; you may need to do something to hold your phone safely. (An elastic band wrapped around the tube may be good enough.)

First, I get the altitude of the GEM set more accurately to my latitude using the spirit level / inclinometer app. The app reads to an accuracy of 0.1 degrees, so you should be able to get better than one degree precision pretty easily.

Next, I get the RA axis pointed to true south, using the compass app. (My compass app works with the phone held at any angle, and includes an automatic adjustment for the deviation between true north and magnetic north, so I don't need to do any mental gymnastics to get a south alignment of better than 1 degree.)

Voila! A visual polar alignment within about 1 degree or better on both axes in a matter of a minute or so.
Reply With Quote
  #20  
Old 27-12-2015, 12:43 PM
caj1311 (Cindi)
Registered User

caj1311 is offline
 
Join Date: Dec 2015
Location: Childers, Queensland, Australia
Posts: 39
As an experienced photographer, but a complete novice astronomer (wanting to get into astrophotography), I had quite a few "Aha" moments reading this article. I found the instruction manual for my GEM indecipherable, and the Northern Hemisphere approach did not help! Thanks heaps!
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 12:08 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Advertisement
OzScopes Authorised Dealer
Advertisement
NexDome Observatories
Advertisement
FLI Cameras and Imaging Accessories
Advertisement
Bintel
Advertisement
Tasco Australia
Advertisement
SkyWatcher Star Discovery
Advertisement
Lunatico Astronomical
Advertisement
Atik 16200
Advertisement
Meade Instruments
Advertisement
Astronomy and Electronics Centre
Advertisement