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Equipment Discussions >> Refractors

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PeterR280
Pooh-Bah
*****

Reged: 05/27/13

Re: Pimping your 102mm gt OTA.. Like what? new [Re: mg73]
      #6055192 - 08/30/13 10:05 PM

limited balancing capability.

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Sarkikos
Postmaster
*****

Reged: 12/18/07

Loc: Suburban Maryland, USA
Re: Pimping your 102mm gt OTA.. Like what? new [Re: PeterR280]
      #6055966 - 08/31/13 12:19 PM

I definitely sold my 4" rings when I sold my C4R.

Now I've ordered the Explore Scientific "Cradle Assembly for White 102mm Telescope," which includes rings, dovetail and carrying handle. It has already shipped. Scheduled delivery is for Sept. 5th, next Thursday.

Mi


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spongebob@55
scholastic sledgehammer
*****

Reged: 12/26/11

Loc: Bergen Co. New Jersey
Re: Pimping your 102mm gt OTA.. Like what? new [Re: smallscopefanLeo]
      #6055971 - 08/31/13 12:23 PM

Quote:

Very cool mods! Lots of intriguing ideas above, thank you for sharing them.

Here is how I have 'outfitted' mine, for now (Day-Star mode)

1 pair of 100mm Rings from Orion
(2) 13" Vixen-type dovetails from Agena Astro

Solar Filter from Orion model 07747

Mil-Spec Duct Tape from Amazon for Telrad base and Solar filter securing

9x50mm Celestron finderscope on extra tall bracket stalk with removable 1.25" eyepiece holder modification, both from Astromart,
combined with Surplus Shed 23mm ~60 degree Konig yielding ~6 1/2 degree fields of view,
covered with Agena Astro 70mm cell / 30mm aperture Solar filter utilizing Baader AstroSolar film

Howie Glatter Parallizer 2" to 1.25" centering & "parallizing" adapter from Collimator.com

Lumicon lightweight multi-coated 1.25" prism diagonal made in Japan, from Ebay

Baader helical 1.25" micro-focusing eyepiece holder and nosepiece from Agena Astro

Smart Astronomy 1.25" 25mm 55 degree AFOV Plossl (40x magnification, 1.37 degree field of view, 2.5mm exit pupil)

Synta Skywatcher AZ4 Alt-Az mount from an 80mm achromat combo that was on clearance at Adorma

Stainless steel 2" diameter CG-5 legs from Astromart"

( http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/5586702 )




Leo, can you tell me about that Baader helical 1.25" micro-focusing eyepiece holder and nosepiece from Agena Astro? What does it do for your set up? Is it like a fine focuser? Since it adds light path length, do you have any problems coming to focus with anything? Thanks in advance..
Bob


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audioaficionado
professor emeritus


Reged: 05/24/12

Loc: Medford, Orygun, USA
Re: Pimping your 102mm gt OTA.. Like what? new [Re: spongebob@55]
      #6056076 - 08/31/13 01:27 PM

The main thing I need for my OTA is a decent tripod. That wiggly aluminum jello one that can with my original Celestron CG-4 mount has gotta go into the metal recycle bin.

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Sarkikos
Postmaster
*****

Reged: 12/18/07

Loc: Suburban Maryland, USA
Re: Pimping your 102mm gt OTA.. Like what? new [Re: audioaficionado]
      #6056088 - 08/31/13 01:32 PM

Steve,

Maybe you can get replacement wooden legs for your CG4. That's what I did for mine years ago. I bought wooden legs for my CG4 from Hands On Optics.

Adjustable wooden leg set

The legs were a little less expensive when I bought mine about six years ago.

Mike


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REC
Post Laureate
*****

Reged: 10/20/10

Loc: NC
Re: Pimping your 102mm gt OTA.. Like what? new [Re: Sarkikos]
      #6056147 - 08/31/13 01:55 PM

I'm still considering mount options, used Nextar SLT, or just getting rings for my Orion EQ2 that I have been using for my C80ED?

Also I see some Orion VersaGo II AZ used???


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WarmWeatherGuy
Carpal Tunnel
*****

Reged: 08/27/11

Loc: Orlando, FL 28° N, 81° W
Re: Pimping your 102mm gt OTA.. Like what? new [Re: audioaficionado]
      #6056168 - 08/31/13 02:07 PM

Quote:

The main thing I need for my OTA is a decent tripod. That wiggly aluminum jello one that can with my original Celestron CG-4 mount has gotta go into the metal recycle bin.




I am guessing you are referring to one like this. I have this one and it is plenty sturdy for the C102.


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Locoman
scholastic sledgehammer
*****

Reged: 03/09/09

Loc: Abilene, Kansas
Re: Pimping your 102mm gt OTA.. Like what? new [Re: REC]
      #6056560 - 08/31/13 07:14 PM Attachment (39 downloads)

Quote:

I'm still considering mount options, used Nextar SLT, or just getting rings for my Orion EQ2 that I have been using for my C80ED?

Also I see some Orion VersaGo II AZ used???




Here's the Nexstar SLT on my Vixen Hal 130 tripod with the the 102 gt. Solid combination.


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dpippel
scholastic sledgehammer
*****

Reged: 04/05/13

Loc: Desierto de Sonora
Re: Pimping your 102mm gt OTA.. Like what? new [Re: Locoman]
      #6056612 - 08/31/13 07:52 PM

Lookin' good!

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REC
Post Laureate
*****

Reged: 10/20/10

Loc: NC
Re: Pimping your 102mm gt OTA.. Like what? new [Re: Locoman]
      #6057222 - 09/01/13 08:03 AM

Oh then the Nexstar mount would be ok then? The used one I'm looking at has the stock steel tubular tripod legs. The owner said it's ok for scopes weighing up to 7lbs. OUR 102 is 7.5 and EP and finder-scope make it 8+.

Do you get any twisting at all at the mounts?

Thanks a lot as I'm ready to pull the trigger on something today, had the scope a week now and would like to use it when it clears up next week. Here are my 3 choices;

1. Get rings for $40 and use on my EQ2,which has a80EDon it

2. Get a used VersaGoII for AZ mount for $120.

3. Get a used Nexstar SLT with aluminum legs for $120.

So fellow 102 gt owners, what do you think?

Bob


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REC
Post Laureate
*****

Reged: 10/20/10

Loc: NC
Re: Pimping your 102mm gt OTA.. Like what? new [Re: Locoman]
      #6057552 - 09/01/13 12:04 PM

Can you use the SLT mount in basic manual mode without setting up the GOTO alignment? What I mean, can you just move it up and down side to side just by hitting the arrow keys on the controller?

Some nights I use scopes in the front of my house with street lights in the western sky and would have a hard time getting it aligned on guide stars. Just would like to put the object in the finder scope and be done?

Thanks,

Bob


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jag767
professor emeritus
*****

Reged: 06/20/13

Loc: Massapequa, NY
Re: Pimping your 102mm gt OTA.. Like what? new [Re: REC]
      #6057598 - 09/01/13 12:33 PM Attachment (28 downloads)

Here's my latest:

I hated the look of orions rings, so i sanded them down to bare metal, 3 coats of gloss black paint sanded in between, and refelted (I used flocking). Personally I'm very glad to have done it, looks so much better.


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jag767
professor emeritus
*****

Reged: 06/20/13

Loc: Massapequa, NY
Re: Pimping your 102mm gt OTA.. Like what? new [Re: jag767]
      #6057601 - 09/01/13 12:33 PM Attachment (28 downloads)

One more:

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Locoman
scholastic sledgehammer
*****

Reged: 03/09/09

Loc: Abilene, Kansas
Re: Pimping your 102mm gt OTA.. Like what? new [Re: REC]
      #6058307 - 09/01/13 09:04 PM

Quote:

Can you use the SLT mount in basic manual mode without setting up the GOTO alignment? What I mean, can you just move it up and down side to side just by hitting the arrow keys on the controller?

Some nights I use scopes in the front of my house with street lights in the western sky and would have a hard time getting it aligned on guide stars. Just would like to put the object in the finder scope and be done?

Thanks,

Bob

You can power it up and use the arrow keys but you cannot move it manually in azimuth. You can move it in Altitude manuall but I wouldn't do it very much.

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careysub
Carpal Tunnel
*****

Reged: 02/18/11

Loc: Rancho Cucamonga, CA
Re: Pimping your 102mm gt OTA.. Like what? new [Re: Ed Holland]
      #6059606 - 09/02/13 04:20 PM

Quote:

I cleaned all the original grease out with mineral spirit and lubricated with molybdenum disulphide graphite engine assembly lube, but any decent grease will do.. use what you have. I'm not a fan of silicone lubricants as they can creep and are very difficult to clean up, but that is just personal preference. Also I prefer the feel of petroleum based greases, each to their own. If drying out ever becomes a problem, overhauling the focuser is easier than reworking my bicycle's wheel bearings




If any decent grease will do - but the original grease needs to go, clearly it is not decent. How can I be sure that some random grease that I have is "decent"?

I have a tube of Lucas white lithium grease - is that good for this?


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Ed Holland
Pooh-Bah


Reged: 06/16/10

Loc: San Jose, CA and Oxford, UK
Re: Pimping your 102mm gt OTA.. Like what? new [Re: careysub]
      #6059683 - 09/02/13 05:05 PM

Yes. That should be a general purpose grease. The Synta stuff is a super viscous and sticky damping grease. Apply the new stuff sparingly, and things should stay smooth and clean.

Ed


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PeterR280
Pooh-Bah
*****

Reged: 05/27/13

Re: Pimping your 102mm gt OTA.. Like what? new [Re: Ed Holland]
      #6059695 - 09/02/13 05:15 PM

It should work fine. There isn't a lot of mechanical action going on. Like previously said, don't put too much.

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REC
Post Laureate
*****

Reged: 10/20/10

Loc: NC
Re: Pimping your 102mm gt OTA.. Like what? new [Re: PeterR280]
      #6059721 - 09/02/13 05:31 PM

Do you have to clean out the old stuff first....and take it apart to do so?

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PeterR280
Pooh-Bah
*****

Reged: 05/27/13

Re: Pimping your 102mm gt OTA.. Like what? new [Re: REC]
      #6059729 - 09/02/13 05:40 PM

the grease Synta uses is like glue. You have to remove it to relube.

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WarmWeatherGuy
Carpal Tunnel
*****

Reged: 08/27/11

Loc: Orlando, FL 28° N, 81° W
Re: Pimping your 102mm gt OTA.. Like what? new [Re: PeterR280]
      #6059867 - 09/02/13 07:27 PM

For anyone who hasn't seen the wonderful photos of the disassembly of the focuser check them out at this link.

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