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Celestron Omni 22150 XLT 102

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#26 JHollJr

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Posted 28 October 2016 - 05:35 AM

I'll have to try posting a photo. I was just out with this scope for a half hour ending at 0605 and find that the star diagonal that I swapped in the other day is already a bit heavy for the alt az mount and tripod. I can see that a sturdier GEM would be good for this scope, but that would defeat the purpose for which I bought this scope. I have GoTo and equatorially sturdy mounts for my other scopes, but I wanted something that I could just "throw" out on the deck and be viewing with wide fields of view. The XLT 102 is perfect for that.

 

I'm still experimenting and learning what the scope can do. I had no expectations when I bought this on a lark a few days ago, but have been impressed with the views at 20x and 26x. I tried an 18.2mm Delite a couple of days ago, but didn't like the decreased TFOV. Anyway, still playing around.

 

Thanks for all the advice. I need all I can get.



#27 JHollJr

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Posted 28 October 2016 - 06:49 AM

 

 


Edited by JHollJr, 28 October 2016 - 06:51 AM.


#28 tony_spina

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Posted 28 October 2016 - 07:39 AM

Looks like you figured out how to get pictures uploaded!

 

in regards to the extra weight and balancing issues get a pair of mounting rings that way you can move the scope forward. This mount works much better when it is properly balanced 

 

 



#29 JHollJr

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Posted 28 October 2016 - 07:57 AM

Looks like you figured out how to get pictures uploaded!

 

in regards to the extra weight and balancing issues get a pair of mounting rings that way you can move the scope forward. This mount works much better when it is properly balanced 

I will probably have to do something, but I can't see how to attach rings to this mount and tripod. The pictures are just a pain to process before uploading. I'm pretty lazy. That's why I want to stick with the Alt Az mount. It's really light. :-)



#30 tony_spina

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Posted 28 October 2016 - 11:36 AM

See the pictures on how I put rings on the 102

 

IMG_3698-5.jpg
 
IMG_3697-4.jpg

 


Edited by tony_spina, 28 October 2016 - 11:38 AM.

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#31 JHollJr

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Posted 28 October 2016 - 11:43 AM

Tony, that looks like a relatively heavy finder if it has a glass objective. I'm still wondering whether or not the GSO crayford focuses will be too heavy. Thanks for the pictures.

#32 clearwaterdave

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Posted 28 October 2016 - 06:50 PM

I feel that the mount is a little weak for 2" ep's.,thats "my" opinion.,,others may not feel this way.,rings can help with balance.,but I'm not sure about the added weight.,again "my opinion".,,after moving the rail the scope has been a treat with the better diagonal and a 1.25" set-up,.,If I want to use 2" with this scope I'll put it on my pipes.,,

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#33 aa6ww

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Posted 29 October 2016 - 05:06 AM

Is this the scope with the plastic dew shield? Its a nice looking scope, complementing the Omni line of scopes

 

 

...Ralph



#34 clearwaterdave

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Posted 29 October 2016 - 04:29 PM

Ralph.,It's metal.,the scope is pretty well built.,the mounting rail IS too short.,but can be tweeked easy enough.,

#35 JHollJr

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Posted 01 November 2016 - 02:16 PM

With the GSO96 crayford focuser on the Celestron Omni XLT AZ 102 there is not enough room for back focus. Here I have pulled the diagonal out about 1/4 inch at the eyepiece out about 3/4 inch and a tower 1.25 miles away is in perfect focus.

 

 

 

I have ordered a two inch long extension tube, which should allow a good focus.


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#36 tony_spina

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Posted 01 November 2016 - 03:29 PM

Justin 

The new focuser looks good!  Having fine focus makes a big difference 



#37 BFaucett

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Posted 01 November 2016 - 04:08 PM

JHoll,

Thanks for that info! I've been thinking about getting a GSO Crayford for my C102AZ. If I get one I'll be sure to order an extension tube at the same time. That will save some aggravation! :)

Bob F.

#38 JHollJr

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Posted 01 November 2016 - 04:49 PM

JHoll,

Thanks for that info! I've been thinking about getting a GSO Crayford for my C102AZ. If I get one I'll be sure to order an extension tube at the same time. That will save some aggravation! :)

Bob F.

The comparison chart http://agenaastro.co...patibility.html suggests that the 102mm f/5 did not require an extension, but apparently one is required for the f/6.5. The site notes:

Most Crayford focuser units are shorter than existing R&P focusers. So while you will typically have more in-focus travel with a new Crayford focuser (which is great for imaging applications), you might not have sufficient out-focus travel to reach focus with all your eyepieces/accessories. In such cases, the problem can be easily fixed with 2" extension tubes that are available separately.


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#39 BFaucett

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Posted 01 November 2016 - 07:32 PM

JHoll,

Thanks for confirming that the GSO96 is the correct focuser! I figured it might be but I hadn't measured the inside diameter of my scope yet. This saves me a little work. :)


I decided to trick out my C102AZ!

An Orion 6x30 RACI finder arrived today.

I ordered the following items today:

Rings and 8" dovetail bar
GSO Crayford 2 speed focuser
Agena dovetail shoe for Crayford focusers to mount the finder
2" length tube extension for the focuser

If this proves to be too much additional weight for the supplied mount then I can always use my Vixen Porta II. Currently, I only have 1.25" diagonals and eyepieces.

I think the upgrades are going to make this a really nice little telescope!

Cheers!
Bob F. :)

Edited by BFaucett, 01 November 2016 - 08:39 PM.

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#40 JHollJr

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Posted 01 November 2016 - 08:54 PM

I don't think there will be too much weight. The R&P focuser that comes with the scope being longer than the GSO seemed less stable than the GSO on the alt az mount. I don't want a heavier mount.

What rings and dovetail did you order. When you get them I'd like to know how they work out. I too ordered the finder boot.

I think this is a very good OTA and if I can keep it light it is perfect for quick wide field looks to complement my other scopes.

Edited by JHollJr, 01 November 2016 - 08:57 PM.

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#41 BFaucett

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Posted 01 November 2016 - 09:18 PM

On Amazon, I ordered the "Orion 7383 8-Inch Dovetail Mounting Plate" and the "Orion 7371 100mm ID Telescope Tube Rings".

I measured the circumference of the tube at 316mm which calculates to a tube diameter of 100.5mm so I'm hoping these rings fit. Of course, there could have been a slight error in my circumference measurement so I think the rings will probably work. Fingers crossed.

The rings and dovetail bar should arrive on Thursday. I'll report back once I've tried them out.

Bob F. :)

Edited by BFaucett, 01 November 2016 - 10:23 PM.

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#42 BigC

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Posted 02 November 2016 - 09:34 AM

Being able to slide the OTA to balance should fix your weight worries. Shipping scopes with those short screwed on dovetails keep INITIAL cost lower.Rings and dovetail allow adjustment for balance and comfort.
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#43 JHollJr

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Posted 02 November 2016 - 03:16 PM

I just installed the Blue Fireball 2" extension tube with 35mm Extension [#X-03]. The telescope now comes into back focus with about 10.5mm to spare. This is not the 2" long extension, rather 1.5 inch extension.

 

 

Now I'll go out and install the StarPointer finder on the GSO96 crayford focuser with the AG-CFURB Vixen/Syna-Style Dovetail Base. When this is done, I'm in business again. I'll wait for a report on the rings and the 8" dovetail.

 

Yay!


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#44 tony_spina

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Posted 02 November 2016 - 03:40 PM

Fantastic. Wishing you clear skies 



#45 JHollJr

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Posted 02 November 2016 - 03:43 PM

[


#46 BFaucett

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Posted 02 November 2016 - 03:46 PM

Looking good! :)

#47 BFaucett

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Posted 03 November 2016 - 09:35 PM

The new rings and dovetail bar arrived today. The rings fit the OTA perfectly. I took some photos for you guys.


The stock dovetail bar removed from the OTA. A 5mm hex key fits the screw heads perfectly:

20161103_204440.jpg


The new rings and dovetail bar:

20161103_204640.jpg


The new rings and dovetail bar attached to the telescope:

20161103_205208.jpg

20161103_205344.jpg

Edited by BFaucett, 03 November 2016 - 09:42 PM.


#48 BFaucett

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Posted 03 November 2016 - 09:40 PM

Finally, the telescope attached to the supplied mount/tripod:

20161103_205925.jpg

20161103_210223.jpg


The finder is a new Orion 6x30 RACI. My new GSO focuser should arrive next week.

Cheers!
Bob F. :)

Edited by BFaucett, 03 November 2016 - 09:41 PM.


#49 rseven

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Posted 03 November 2016 - 10:04 PM

I'm finding your need for an extender interesting. I have a 102SLT, which has identical specs with the exception of the XLT finish. I use the GSO focuser without any focus issues. Does the XLT coating do this? It doesn't seem as if it should, but there is something at work.

Enjoy your 102's, I have a good idea of the fun your having with these scopes.

Rich

#50 aa6ww

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Posted 03 November 2016 - 11:44 PM

 Lots of these issue revolve around the diagonal used and the eyepieces. 

 

...Ralph

 

 

I'm finding your need for an extender interesting. I have a 102SLT, which has identical specs with the exception of the XLT finish. I use the GSO focuser without any focus issues. Does the XLT coating do this? It doesn't seem as if it should, but there is something at work.

Enjoy your 102's, I have a good idea of the fun your having with these scopes.

Rich


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