Go Back   IceInSpace > Equipment > Equipment Discussions
Register FAQ Calendar Today's Posts Search

Reply
 
Thread Tools Rate Thread
  #1  
Old 01-10-2008, 11:17 AM
Davekyn's Avatar
Davekyn (David)
Loves Staring Into Space!

Davekyn is offline
 
Join Date: Jul 2007
Location: Hervey Bay QLD Au
Posts: 493
How to - Red Dot finder on GSO DOB ?

Any ideas on how to attach a red dot finder onto a 12" Dob that does not have any fittings for such a thing?

Would I also have to add some kind of weight at the bottome of tube to make up the difference such as using somthing like small magnets?

Any recommendations woudl be great.
Thanks
Dave
Reply With Quote
  #2  
Old 01-10-2008, 01:08 PM
dannat's Avatar
dannat (Daniel)
daniel

dannat is offline
 
Join Date: Sep 2007
Location: Macedon shire, Australia
Posts: 3,427
? isn't it a bit unusual for no finder, you will probably have to measure and drill holes, don't d it upright though you don't want dril shavings going toawrd mirror - or if you dare could take mirror out
Reply With Quote
  #3  
Old 01-10-2008, 01:30 PM
bojan's Avatar
bojan
amateur

bojan is offline
 
Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 7,105
Try this..
I made it from standard square al tubing (50x25mm), cut to 20mm length.
Apart from cutting (Alcan can do it for you), it requires a bit of additional work with file, and some holes to drill (not shown on this drawing).
Red dot finder slides on the top rail, and then you can fix it by tightening the screws at the finder's side.
Attached Thumbnails
Click for full-size image (Red_dot_flange.jpg)
31.5 KB24 views

Last edited by bojan; 01-10-2008 at 04:13 PM.
Reply With Quote
  #4  
Old 01-10-2008, 03:19 PM
Space Dog's Avatar
Space Dog (Ric)
Registered User

Space Dog is offline
 
Join Date: Mar 2007
Location: Perth
Posts: 16
Hi Dave,

I persume your Red Dot finder has a Dovetail mount, if so the easiest way to mount it is to purchase a Dovetail base and attach it to your telescope in a suitable position for easy use.
I have mounted a Red Dot finder to an Orion 200mm Dobsonian
telescope ,next the existing 9 x 50 finderscope and it works a treat.
I have found that extra weight is not required to counter balance the Red Dot finder.
You can purchase a dovetail base online from Bintel for $10.00 plus postage that would do the job.
PS. I have no a interest in Bintel apart from being a satisfied customer.
Reply With Quote
  #5  
Old 01-10-2008, 07:40 PM
Davekyn's Avatar
Davekyn (David)
Loves Staring Into Space!

Davekyn is offline
 
Join Date: Jul 2007
Location: Hervey Bay QLD Au
Posts: 493
Thanks guys,
I'll go with Ric on that one. I'm about o order in the next day or two...The scope & will be taking the advice of a lo of people in here & settling in with what comes with the scope first.

Once I become acustomed to the scope itself, the plan thus far may indeed to then purchase a red dot finder or even laser...But yea Ric...I was thinking about ataching a dovetail mount. I was just worried about how far the bolt & nuts might protude into the light path of the tube as I notice the countersink holes (on the dove tail mounting bracket sold at Andrews Communication) seem to be sunny side up.

After I get the scope I'll have a good look inside and out, & most likely go down the path your saying.

Cheers folks
Dave
Reply With Quote
  #6  
Old 01-10-2008, 08:41 PM
PCH's Avatar
PCH (Paul)
Registered User

PCH is offline
 
Join Date: Feb 2007
Location: Perth WA
Posts: 2,313
Quote:
Originally Posted by Space Dog View Post
Hi Dave,

I persume your Red Dot finder has a Dovetail mount, if so the easiest way to mount it is to purchase a Dovetail base and attach it to your telescope in a suitable position for easy use.
I have mounted a Red Dot finder to an Orion 200mm Dobsonian
telescope ,next the existing 9 x 50 finderscope and it works a treat.
I have found that extra weight is not required to counter balance the Red Dot finder.
You can purchase a dovetail base online from Bintel for $10.00 plus postage that would do the job.
PS. I have no a interest in Bintel apart from being a satisfied customer.
Hi Dave,

ditto that. I did exactly this also, and it works a treat. It's also a great combination of viewfinding devices to fit to make finding stuff really easy.

You just have a quick squiz thru the rdf, switch to the finderscope to centre the object, and then quickly nip to the EP. I'd be prepared to bet you'll wonder why you didn't do this a lot earlier..... Apart from the fact that you appear not to have had a scope a lot earlier - duh

Cheers,
Reply With Quote
  #7  
Old 05-10-2008, 04:16 AM
Crusader
Registered User

Crusader is offline
 
Join Date: Aug 2008
Location: South Africa
Posts: 100
Double sided sticky tape works wonders. I stuck a RDF on top of my existing RACI finder. After 2 months it's still on and only requires slight adjustments from time to time. The only downside is that you have to bend reasonably low to see the red dot.
Reply With Quote
  #8  
Old 05-10-2008, 07:43 AM
BC
Registered User

BC is offline
 
Join Date: May 2005
Location: Long Beach NSW
Posts: 214
Go the double sided tape. Telrad comes supplied with it. I only use a telrad on my 10" dob and have removed the normal finder scope because I never use it. Note that some red dot finders require you to line up your eye in the correct place, which defeats the purpose in my opinion. Telrad doesn't have this problem.

Bruce
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 11:47 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement