#1  
Old 17-10-2019, 07:32 PM
Bobbyoutback's Avatar
Bobbyoutback
Registered User

Bobbyoutback is offline
 
Join Date: Oct 2009
Location: Broken Hill
Posts: 220
Must have collimator .

Hello all . I just bought and tested one of these collimators :
https://explorescientificusa.com/col...nment-eyepiece
Very happy with the simple quick way it works , I recommend every newt owner get one , they are a bargain

You can get them in Australia from https://www.astrodog.com.au/
for about $15 including postage .

A happy
Bobby
Reply With Quote
  #2  
Old 17-10-2019, 11:23 PM
ngcles's Avatar
ngcles
The Observologist

ngcles is offline
 
Join Date: Dec 2006
Location: Billimari, NSW Central West
Posts: 1,571
Hi Bobby & All,

Have had one of these for about 25 years now. Very, very cheap and effective.

best,

L.
Reply With Quote
  #3  
Old 17-10-2019, 11:58 PM
Bobbyoutback's Avatar
Bobbyoutback
Registered User

Bobbyoutback is offline
 
Join Date: Oct 2009
Location: Broken Hill
Posts: 220
Quote:
Originally Posted by ngcles View Post
Hi Bobby & All,

Have had one of these for about 25 years now. Very, very cheap and effective.

best,

L.
Pleased to know you approve these , a question ?
The offset needed for perfect collimation can not be done with just a laser collimator can it !

Bobby
Reply With Quote
  #4  
Old 18-10-2019, 02:09 AM
Ukastronomer (Jeremy)
Feel free to edit my imag

Ukastronomer is offline
 
Join Date: Jan 2019
Location: Llandysul, WALES, UK
Posts: 1,220
Quote:
Originally Posted by Bobbyoutback View Post
Hello all . I just bought and tested one of these collimators :
https://explorescientificusa.com/col...nment-eyepiece
Very happy with the simple quick way it works , I recommend every newt owner get one , they are a bargain

You can get them in Australia from https://www.astrodog.com.au/
for about $15 including postage .

A happy
Bobby
you can also make them for nothing from old film canister caps or similar just a cap and a hole

Personally nothing is better than a laser available very cheap to expensive

About ........................... $15

https://www.ebay.co.uk/i/15317867339...UaAqgwEALw_wcB
Reply With Quote
  #5  
Old 18-10-2019, 06:43 AM
dannat's Avatar
dannat (Daniel)
daniel

dannat is offline
 
Join Date: Sep 2007
Location: Macedon shire, Australia
Posts: 3,381
Quote:
Originally Posted by Bobbyoutback View Post
Hello all . I just bought and tested one of these collimators :

You can get them in Australia from https://www.astrodog.com.au/
for about $15 including postage .
bobby i canít see them on astrodog, can you link specifically
Reply With Quote
  #6  
Old 18-10-2019, 08:51 AM
ngcles's Avatar
ngcles
The Observologist

ngcles is offline
 
Join Date: Dec 2006
Location: Billimari, NSW Central West
Posts: 1,571
Hi Bobby,

Quote:
Originally Posted by Bobbyoutback View Post
Pleased to know you approve these , a question ?
The offset needed for perfect collimation can not be done with just a laser collimator can it !

Bobby
Offset collimation really only achieves one thing over and above centre/centre collimation and that is to make the 100% illuminated field perfectly circular. Without that offset is is slightly oval in shape. The difference is really pretty slight and I have never really seen the need to do it myself. "Centred" collimation provides just as perfect an image in the eyepiece save for the non-circular 100% field. It is however more important if the telescope is used for imaging or photography. It is best achieved with a sight tube/Cheshire or an un-barlowed laser.

I recently bought a high-quality Tublug barlowed laser collimator myself, not because it does a vastly better job, but it does make it quicker and simpler -- particularly when the focuser and the collimation knobs are about 3 metres apart and two or three steps up a ladder. Much more often than not I'm alone when setting up and observing with my telescope. The barlowed laser means I can stand/squat at the back and adjust the bolts and see the result in real time as I move the primary. I don't need to shuttle back and forth between the top end of the 'scope and the bottom as the adjustments are made and checked.

But I still keep my Rigel as a back-up, just in case the battery fails (it is a rechargeable).

Best,

L.

Last edited by ngcles; 18-10-2019 at 09:15 AM.
Reply With Quote
  #7  
Old 18-10-2019, 10:47 AM
Bobbyoutback's Avatar
Bobbyoutback
Registered User

Bobbyoutback is offline
 
Join Date: Oct 2009
Location: Broken Hill
Posts: 220
Quote:
Originally Posted by dannat View Post
bobby i canít see them on astrodog, can you link specifically
Hi Daniel ,
They are not shown on the website , you will need to phone him to order one .

Cheers
Bobby .
Reply With Quote
  #8  
Old 18-10-2019, 11:17 AM
Bobbyoutback's Avatar
Bobbyoutback
Registered User

Bobbyoutback is offline
 
Join Date: Oct 2009
Location: Broken Hill
Posts: 220
Quote:
Originally Posted by Ukastronomer View Post
you can also make them for nothing from old film canister caps or similar just a cap and a hole
There is a matt reflection area under the peep hole , not just a cap & hole !

Bobby
Reply With Quote
  #9  
Old 18-10-2019, 11:36 AM
ngcles's Avatar
ngcles
The Observologist

ngcles is offline
 
Join Date: Dec 2006
Location: Billimari, NSW Central West
Posts: 1,571
Hi Bobby & All,

Quote:
Originally Posted by Bobbyoutback View Post
There is a matt reflection area under the peep hole , not just a cap & hole !

Bobby
True -- this can be fixed with a bit of alfoil. The only problem with a home made one is that the hole must be drilled very precisely centred -- it's easy to get wrong. Unless it is, the 'scope won't be collimated correctly.

Also, 35mm film canister lids are a lot harder to come by nowadays than they used to be ...

Best,

L.
Reply With Quote
  #10  
Old 30-10-2019, 11:19 PM
Bobbyoutback's Avatar
Bobbyoutback
Registered User

Bobbyoutback is offline
 
Join Date: Oct 2009
Location: Broken Hill
Posts: 220
I bought a real Auto Collimator & now know why they work so well .

If you have ever been to a fun park were they have a hall of mirrors and you check your reflection in the mirror your looking at whilst seeing the one behind you , what do you see ? multiple reflections .

Because those mirrors have a tilt .
Now if they were perfectly aligned with no tilt You would not see your reflection ' that's what the Auto Collimator doe's .
You go from a bright reflection to a dark one when your scope is spot on !

But you will need to centre mark your secondary before this to get those earlier adjustments extra close .

After you have used your best tools ( lasers included ) to get what you think is spot on , then use the auto collimator for perfection .

Have Fun
Bobby
Reply With Quote
  #11  
Old 01-11-2019, 07:32 AM
TareqPhoto (Tareq)
Registered User

TareqPhoto is offline
 
Join Date: Oct 2017
Location: Ajman - UAE
Posts: 199
Well, i have 3 collimators so far
Reply With Quote
  #12  
Old 17-11-2019, 03:37 PM
crs (Colin)
Colin Melbourne

crs is offline
 
Join Date: Feb 2018
Location: Melbourne
Posts: 7
I want a good way to collimate a RC.....
Reply With Quote
  #13  
Old 19-11-2019, 08:54 PM
BadSean (Sean)
Registered User

BadSean is offline
 
Join Date: Mar 2019
Location: Perth
Posts: 5
Quote:
Originally Posted by crs View Post
I want a good way to collimate a RC.....
Yes I'm also after the optimal method of collimating a RC scope. Laser eyepiece adapter (like the ebay one linked above) or another style (like this? https://www.bintel.com.au/product/fa...v=6cc98ba2045f)???
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 12:35 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Advertisement
SkyWatcher Australia
Advertisement
OzScopes Authorised Dealer
Advertisement
Lunatico Astronomical
Advertisement
Bintel
Advertisement
Celestron Australia
Advertisement
NexDome Observatories
Advertisement
Meade Australia
Advertisement
Astronomy and Electronics Centre
Advertisement