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The base holder of the secondary lens stucked in the forntal lens of the telescope

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#1 hisham37

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Posted 24 September 2019 - 02:03 AM

Hi All.

 

Hope u r doing fine,the base holder of my secondary lens for double stacking got stuck and fixed to the main frontal lens of the SolarMax lll 

 

telescope,any idea or suggestion how to screw it back,it is so stuck......no way to remove.

 

I'm attaching some photos for a better clarification,thanks in advance if some has an idea.

 

 

Hisham.

Attached Thumbnails

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  • 71279538_1354210128068796_1556363871667617792_n (1).jpg


#2 MalVeauX

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Posted 24 September 2019 - 07:13 AM

Maybe a rubber/canvas pipe strap wrench and a hair dryer (warm it up for a bit, then attempt to unthread it).

 

Very best,



#3 hisham37

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Posted 24 September 2019 - 08:02 AM

Maybe a rubber/canvas pipe strap wrench and a hair dryer (warm it up for a bit, then attempt to unthread it).

 

Very best,

Thanks,i'll try.



#4 mikerepp

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Posted 24 September 2019 - 08:05 AM

If heat doesn't do it try the opposite, try freezing it.   Place it in the freezer for an hour or so and then try it.  You could also try heating the female end after its been frozen. Good luck!


Edited by mikerepp, 24 September 2019 - 08:05 AM.

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#5 BeltofOrion

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Posted 24 September 2019 - 08:15 AM

I have the same scope ... but I am unable to make any sense of your photos. Your scope appears to be double stacked. Is that correct? Your photos show a knurled ring at the front. Are you sure it belongs there? That is not where it is located on mine. I will take a photo and upload. Also, I had a similar problem with the visual back on my Celestron Edge HD. I uploaded photos to show how I fixed it. Hot water in one part, ice in the other. Am I correct in assuming the part in question is just plastic or metal ... no lenses or glass of any kind? If that is the case, maybe you could use that method. But DEFINITELY NOT if there are sensitive parts inside.


Edited by BeltofOrion, 24 September 2019 - 08:37 AM.


#6 BeltofOrion

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Posted 24 September 2019 - 08:20 AM

Here is the photo. The knurled ring is not on the back piece. That ring on that piece is smooth. Did you perhaps have the pieces apart and put it together incorrectly?


Edited by BeltofOrion, 24 September 2019 - 09:35 AM.


#7 BeltofOrion

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Posted 24 September 2019 - 08:22 AM

Sorry, the file was too big. I will have to resize it.


Edited by BeltofOrion, 24 September 2019 - 08:36 AM.


#8 BeltofOrion

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Posted 24 September 2019 - 08:35 AM

Resized.

Attached Thumbnails

  • image.jpeg

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#9 BeltofOrion

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Posted 24 September 2019 - 08:42 AM

Both etalon filters can be easily removed ... you can then use it as a night time scope ... with the blocking filter removed and replaced with a regular diagonal, of course. But if you wish to remove only the front etalon, that setscrew you see in the knurled ring has to be removed first. If you do that, though, first you better mark how the two go together because they are aligned properly at the factory.


Edited by BeltofOrion, 24 September 2019 - 08:45 AM.


#10 BeltofOrion

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Posted 24 September 2019 - 08:58 AM

I'll save you the trouble of looking for the post I referenced concerning the Clestron Edge HD. Here is a link:

 

https://www.cloudyni...-adapter-plate/



#11 hisham37

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Posted 24 September 2019 - 12:35 PM

Resized.

It is the same ring of the secondary lens of the double stack.



#12 BeltofOrion

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Posted 24 September 2019 - 12:57 PM

I understand it is the same ring ... what I can't understand is why it is situated where it is in your photo. Maybe I'm missing something?



#13 hisham37

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Posted 24 September 2019 - 11:49 PM

This ring part belongs to the secondary lens which is detached from it so i could try more freely to un-thread it.



#14 hisham37

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Posted 26 September 2019 - 05:02 AM

I have the same scope ... but I am unable to make any sense of your photos. Your scope appears to be double stacked. Is that correct? Your photos show a knurled ring at the front. Are you sure it belongs there? That is not where it is located on mine. I will take a photo and upload. Also, I had a similar problem with the visual back on my Celestron Edge HD. I uploaded photos to show how I fixed it. Hot water in one part, ice in the other. Am I correct in assuming the part in question is just plastic or metal ... no lenses or glass of any kind? If that is the case, maybe you could use that method. But DEFINITELY NOT if there are sensitive parts inside.

U R right,i previously misplaced the plastic rim on the front of the tuning ring ,this is not coming out either,but this has nothing to do

 

with the stuck between the ring and he telescope front lens,i'm trying the freezing now for 2 hours,i'll let you know what happens.



#15 hisham37

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Posted 26 September 2019 - 06:36 AM

Tried freezing,my advice....do not try this at home.smile.gif



#16 rigel123

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Posted 26 September 2019 - 04:57 PM

I have had luck with strap wrenches like Marty suggested when I have two pieces freeze together.
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#17 hisham37

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Posted 27 September 2019 - 11:50 AM

Thank you all for your suggestions,thank you Beltoforion for drawing my attention for the misplacement.

The problem was solved,detached with the help of a mechanic,we did with simple counter threading,he did not charge for that,but certainly for other thing,i think we should be careful when threading these astronomical instruments,i mean not using extra force.

Thanks again,i love this site.smile.gif



#18 BeltofOrion

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Posted 27 September 2019 - 01:51 PM

Glad you're back in business! As soon as I saw the photos, I realized it was out of place ... but only because I have the same scope, of course. Am I to assume you removed both etalons separately and when you went to put them back on you attempted to put one on backwards? I've only ever removed the two etalons as a group ... that is, I've never removed the setscrew and removed them separately. If I ever do, I will be very careful now.  🙂


Edited by BeltofOrion, 27 September 2019 - 01:52 PM.



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