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snorkler
Aperture Aficionado


Reged: 10/11/04
Posts: 10041
Loc: Bay Area, California
My XT10i focuser, finder, and Telrad modifications
      #877132 - 03/19/06 01:33 PM Attachment (37 downloads)

Many XTi owners position their Telrads on the far side of their finderscopes or focusers, necessitating bothersome eye repositioning every time they use their Telrads. Here's a photo showing how I mounted mine.Attachment

I used the original finderscope's outer bracket mounting holes as its new inner bracket mounting holes, and drilled two new outer bracket mounting holes. While I was at it, I moved the bracket's set screw to the outside, and reversed the finderscope's mounting foot so its safety stop now works. If I leave the bracket's set screw loose, the finderscope's foot doesn't fall out of the bracket. It stops when it reaches the bracket's edge.

Note how I redrilled my Telrad's on/off switch to the left side. Just drill a new hole and move your switch. There's enough wire length to allow the move with no trouble. I used a soldering iron to melt the Telrad's base enough to clear the finderscope's bracket.

My focuser has Mercury Systems Support's FF-1 fine focuser dual speed focuser adapter, and its 2"-1" compression ring adapter.

Attachment

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I'm not the lowest of the low, but I am the slowest of the slow. '06 Scion xB. 49.6 mpg avg over 38,000 miles. 177% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg


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Tim in GA
Pooh-Bah


Reged: 02/06/06
Posts: 1446
Loc: Buford, GA
Re: My XT10i focuser, finder, and Telrad modificat new [Re: snorkler]
      #877138 - 03/19/06 01:41 PM Attachment (50 downloads)

Very cool! Nice job.

I did the same thing this weekend. I was a little afraid to go drilling new holes, but it was pretty easy.

Attachment

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There are some who call me...........Tim
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Canon 5DMKII, 30D
Canon 17-40L, 100 Macro, 70-200L f/2.8 IS II
Zeiss Makro Planar 50 f/2
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http://www.tkephotography.com/


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arowana
Carpal Tunnel


Reged: 01/02/06
Posts: 2905
Loc: Pleasant View,Tennessee
Re: My XT10i focuser, finder, and Telrad modifications new [Re: snorkler]
      #877618 - 03/19/06 07:59 PM Attachment (39 downloads)

Nice job!
I did not want to drill any more holes in my OTA so I just
shortened the telrad.

Attachment

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CPC 1100
Earthwin Binoviewer with Dielectric P/F Switch
Matched Pair of 24 Pan's


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Brad P
member


Reged: 01/20/06
Posts: 80
Loc: Virginia
Re: My XT10i focuser, finder, and Telrad modifications new [Re: arowana]
      #878133 - 03/20/06 07:18 AM

I could not bring myself to drill holes into my XT10i.

Drill in hand, I chickened out. Since I was installing the smaller Orion EZ Finder in the same location as your Telrads, I didn't have the issues of limited space. I noticed that the adhesive pad that came with the EZ Finder (for direct application to the tube) said "3M VHB," which I decided meant "Very High Bond." So I used an x-acto knife and cut out two slivers that fit the feet of the mounting plate.
(Another data point is that I cannot remove the adhesive pad of another EZ Finder from my Meade without some serious scraping/solvent action!)

Its holding fast after three days. Real test will come when it gets hot.

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Orion XT10i
Meade 4500 (converted to Dob)
Orion ST80
Orion Ultraview 10x50 Binoculars


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DeepSpaceTour
Post Laureate


Reged: 10/25/05
Posts: 3164
Loc: In the dark and"WAY"out there!
Re: My XT10i focuser, finder, and Telrad modificat new [Re: Brad P]
      #878197 - 03/20/06 08:44 AM

On my Antares Dob I didn't have to move anything or drill any holes when I installed my Telrad,it fit perfectly between the CR-1 and my Antares RACI illuminated finder.I believe the reason for this is that the Antares RACI Illuminated finder is longer than the stock finder,this puts the finder eyepiece well out of the way of the Telrad,and in a perfect(comfortable) position for viewing through.clear skies.

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Bill
-17.5"F/5 Discovery TD /Dob driver/ArgoNavis
Kendrick dew control/Obsession Alt bearings
-Antares 152-F/6.5 refractor on HEQ-5 Pro
-25x100 Binos
-15x70 Binos
-Collimating tools "LOTS"
- TV ep's *13-Ethos *31T-5*
- 2" Barlows
- Pelican1600


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miniventures
Something Else


Reged: 09/13/03
Posts: 11259
Loc: Powell Butte, Central Oregon
Re: My XT10i focuser, finder, and Telrad modificat new [Re: DeepSpaceTour]
      #878286 - 03/20/06 10:08 AM

Those pads are pretty stout. At the Sunriver Nature Center Observatory, all the scopes which have telrads on them are attached with the original double-sided pads and it has been years for some of the scopes. Daytime temperatures in the observatory are commonly over 100* during the summer.

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LarryC
Volunteer
http://www.sunrivernaturecenter.org






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Chris T
super member


Reged: 01/05/05
Posts: 153
Loc: Florida
Re: My XT10i focuser, finder, and Telrad modifications new [Re: arowana]
      #878301 - 03/20/06 10:18 AM

Looks awsome. Nice work. Tell me about the fine focus adapter. Where do you get them and how do they work?

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Chris Tackett


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arowana
Carpal Tunnel


Reged: 01/02/06
Posts: 2905
Loc: Pleasant View,Tennessee
Re: My XT10i focuser, finder, and Telrad modifications new [Re: Chris T]
      #878952 - 03/20/06 05:33 PM

The fine focus is accually the Accu Focus from Orion.
If you have a stock orion R&P focuser, it will mount without any new mods. If you have a Moonlite CR-1, you will need to make an adapter to fill the extra space between the Accu Focus bendable coupler and the CR-1 focus rod.
The focus rod is smaller than the Orion R&P rod.
These adapters, or spacers, can be made from many things like concrete screw sleeves or large copper wire connectors.
Just use your immagination and let us know how it works out if you do decide to do this.

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CPC 1100
Earthwin Binoviewer with Dielectric P/F Switch
Matched Pair of 24 Pan's


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