Go Back   IceInSpace > Beginners Start Here > Beginners Talk
Register FAQ Calendar Today's Posts Search

Reply
 
Thread Tools Rate Thread
  #1  
Old 25-01-2010, 08:27 PM
Esseth's Avatar
Esseth (Alan)
Worse or better?

Esseth is offline
 
Join Date: Aug 2009
Location: Brisbane
Posts: 319
Have i ruined my scope for long term use?

Ok so ill set the scene.

I bought a laser collimnator jiggy so i could align everything before i take the scope away this weekend coming. So the laser was on and i had my allen key/screwdriver thing and the tip fell off (it must have become unmagnetised or something) and fell down onto the mirror and down the side.

It has left a tiny little dot on the mirror that i can only assume is a chip, now i just had it out and checked out the moon while it was still light and there was no noticable difference but what effect might this have on future viewing for DSO's and whatnot.

I am not so naive to assume nothing.

Further it was so annoying becasue i have been so careful around it, moving gently and always having the covers on and whatnot... well thats my story... FML lol
Reply With Quote
  #2  
Old 25-01-2010, 08:43 PM
supernova1965's Avatar
supernova1965 (Warren)
Buddhist Astronomer

supernova1965 is offline
 
Join Date: Aug 2009
Location: Phillip Island,VIC, Australia
Posts: 4,073
Well this is the mirror in my scope which I purchased cheap and I tell you I can see the Ring nebular really well from a light polluted area great views of the great nebular in Orion wonderful views of Saturn,Mars and Jupiter. I will get it fixed when I can afford it but for now I find it just great. I am thinking that I shouldn't clean it as I might remove more coating. And my pictures of the Moon in the Compendium were taken with this scope
Attached Thumbnails
Click for full-size image (DSCF1572.jpg)
78.7 KB292 views

Last edited by supernova1965; 25-01-2010 at 08:58 PM.
Reply With Quote
  #3  
Old 25-01-2010, 08:48 PM
mental4astro's Avatar
mental4astro (Alexander)
kids+wife+scopes=happyman

mental4astro is offline
 
Join Date: Jun 2008
Location: sydney, australia
Posts: 4,979
If viewing the moon has not showed up any additional ghost reflections or wierd shadows, then no problem. Don't forget, the biggest 'defect' in a reflector is the secondary obstruction.

Maybe, just maybe something may show up with astrophotography. If it was fatal, I'm sure you would have seen something by now.
Reply With Quote
  #4  
Old 25-01-2010, 08:58 PM
DavidU's Avatar
DavidU (Dave)
Like to learn

DavidU is offline
 
Join Date: Jul 2007
Location: melbourne
Posts: 4,835
Nothing to worry about at all Alan.
Reply With Quote
  #5  
Old 25-01-2010, 09:40 PM
Hagar (Doug)
Registered User

Hagar is offline
 
Join Date: Oct 2006
Location: Australia
Posts: 4,646
Nothing to worry about Alan. Even marks ten times the size you describe dont render a mirror useless. Just makes us that do it feel useless. Dont worry to much.
Reply With Quote
  #6  
Old 25-01-2010, 09:40 PM
pgc hunter's Avatar
pgc hunter
Registered User

pgc hunter is offline
 
Join Date: Feb 2009
Location: Renmark, SA
Posts: 2,981
You've nothing to worry about....think about how much surface area that chip takes up, compared to the central obstruction
Reply With Quote
  #7  
Old 25-01-2010, 09:59 PM
Esseth's Avatar
Esseth (Alan)
Worse or better?

Esseth is offline
 
Join Date: Aug 2009
Location: Brisbane
Posts: 319
Ok thanks guys, i can relax now while i wait for mars and saturn to pop there heads up

Gotta love this site lol
Reply With Quote
  #8  
Old 25-01-2010, 10:47 PM
DavidU's Avatar
DavidU (Dave)
Like to learn

DavidU is offline
 
Join Date: Jul 2007
Location: melbourne
Posts: 4,835
Alan, never work on a Dob when it is vertical.
Reply With Quote
  #9  
Old 25-01-2010, 10:56 PM
barx1963's Avatar
barx1963 (Malcolm)
Bright the hawk's flight

barx1963 is offline
 
Join Date: Nov 2008
Location: Mt Duneed Vic
Posts: 3,978
And if using a screwdriver with interchangeable times tape it up first. I also have a little thing I tie to my wrist and attched to the screwdriver just in case i have brain fade and decide to adjust something with it pointing up!
Reply With Quote
  #10  
Old 26-01-2010, 08:31 AM
Esseth's Avatar
Esseth (Alan)
Worse or better?

Esseth is offline
 
Join Date: Aug 2009
Location: Brisbane
Posts: 319
Quote:
Originally Posted by DavidU View Post
Alan, never work on a Dob when it is vertical.
Duh, why didn't i think of that lol...

Thanks for the advice.
Reply With Quote
  #11  
Old 29-01-2010, 03:31 PM
el_draco (Rom)
Politically incorrect.

el_draco is offline
 
Join Date: Apr 2009
Location: Tasmania (South end)
Posts: 2,315
There was case in the States many years ago when an employee of a significant observatory got fired and took revenge by unloading a magazine from a magnum into the primary mirror. Did not seriously affect the telescope. Screw driver... nah... Warren, I'm impressed man!!
Reply With Quote
  #12  
Old 29-01-2010, 10:09 PM
mental4astro's Avatar
mental4astro (Alexander)
kids+wife+scopes=happyman

mental4astro is offline
 
Join Date: Jun 2008
Location: sydney, australia
Posts: 4,979
Quote:
Originally Posted by el_draco View Post
There was case in the States many years ago when an employee of a significant observatory got fired and took revenge by unloading a magazine from a magnum into the primary mirror.

Case of the wrong tool for the job!

Ford No. 1 Tool better choice (ie, hammer), .
Reply With Quote
  #13  
Old 30-01-2010, 08:27 PM
shane.mcneil's Avatar
shane.mcneil
Registered User

shane.mcneil is offline
 
Join Date: Aug 2009
Posts: 172
Quote:
Originally Posted by DavidU View Post
Alan, never work on a Dob when it is vertical.
I was working on mine with the tube horizontal thinking all was safe. Until my 2yr old ran up and rolled a golf ball down it onto the mirror. Never can win...

Shane
Reply With Quote
  #14  
Old 30-01-2010, 10:00 PM
Screwdriverone's Avatar
Screwdriverone (Chris)
I have detailed files....

Screwdriverone is offline
 
Join Date: Feb 2008
Location: Kellyville Ridge, NSW Australia
Posts: 3,306
Uhhh, Warren, I think someone replaced your mirror with a HUBCAP!



Chris
Reply With Quote
  #15  
Old 31-01-2010, 02:36 AM
southerncross's Avatar
southerncross (Jeff)
Registered User

southerncross is offline
 
Join Date: Dec 2009
Location: Cairns
Posts: 25
Quote:
Originally Posted by Screwdriverone View Post
Uhhh, Warren, I think someone replaced your mirror with a HUBCAP!



Chris
Huh? I thought that was a photo from a sewer cam?
Reply With Quote
  #16  
Old 31-01-2010, 07:39 AM
supernova1965's Avatar
supernova1965 (Warren)
Buddhist Astronomer

supernova1965 is offline
 
Join Date: Aug 2009
Location: Phillip Island,VIC, Australia
Posts: 4,073
Quote:
Originally Posted by southerncross View Post
Huh? I thought that was a photo from a sewer cam?
Quote:
Originally Posted by Screwdriverone View Post
Uhhh, Warren, I think someone replaced your mirror with a HUBCAP!



Chris
I was wondering why it was so cheap. Well I am the proud owner of a HUBCAP in a SEWER that can see the Ring Nebula I suppose that would be right in a SEWER
Reply With Quote
  #17  
Old 31-01-2010, 09:54 PM
Lumen Miner's Avatar
Lumen Miner (Mitchell)
Registered User

Lumen Miner is offline
 
Join Date: Jun 2009
Location: Beecroft, Sydney
Posts: 825
Quote:
Originally Posted by supernova1965 View Post
Well this is the mirror in my scope which I purchased cheap and I tell you I can see the Ring nebular really well from a light polluted area great views of the great nebular in Orion wonderful views of Saturn,Mars and Jupiter. I will get it fixed when I can afford it but for now I find it just great. I am thinking that I shouldn't clean it as I might remove more coating. And my pictures of the Moon in the Compendium were taken with this scope
That mirror is awesome mate!! Kudos to you for still using it. From your description it sounds like it preforms well. You going to get it re-coated at any stage?
Reply With Quote
  #18  
Old 31-01-2010, 10:36 PM
supernova1965's Avatar
supernova1965 (Warren)
Buddhist Astronomer

supernova1965 is offline
 
Join Date: Aug 2009
Location: Phillip Island,VIC, Australia
Posts: 4,073
Yes I will Mitchell I will get it re-coated I just have to find out how much it will cost and come up with the money any advise on whom I might get to do the job and how much money I am looking at would be appreciated
Reply With Quote
  #19  
Old 31-01-2010, 11:12 PM
DavidU's Avatar
DavidU (Dave)
Like to learn

DavidU is offline
 
Join Date: Jul 2007
Location: melbourne
Posts: 4,835
Chi Qin Co.

Address: 10 Clissold Pde, Campsie, NSW, 2194
Phone number: (02) 97891047

Quote:
Originally Posted by supernova1965 View Post
Yes I will Mitchell I will get it re-coated I just have to find out how much it will cost and come up with the money any advise on whom I might get to do the job and how much money I am looking at would be appreciated
Reply With Quote
  #20  
Old 01-02-2010, 07:02 AM
supernova1965's Avatar
supernova1965 (Warren)
Buddhist Astronomer

supernova1965 is offline
 
Join Date: Aug 2009
Location: Phillip Island,VIC, Australia
Posts: 4,073
Quote:
Originally Posted by DavidU View Post
Chi Qin Co.

Address: 10 Clissold Pde, Campsie, NSW, 2194
Phone number: (02) 97891047
Thanks for that will look into it once finances get in to a better place just had to spend over $1000 on the car but you can't get to the dark sites if you don't have a car.
Reply With Quote
Reply

Bookmarks


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 11:38 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Advertisement
Testar
Advertisement
Bintel
Advertisement