Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

sgl_imaging_challenge_banner_dslr_mirrorlesss_winners.thumb.jpg.9deb4a8db27e7485a7bb99d98667c94e.jpg

JimmyT123

Need Help Assembling Mount for LS50THa

Recommended Posts

Hello all,

I was recently gifted an LH50THa solar telescope from a friend.  It didn't come with a manual and I'm unsure if I'm missing pieces.  I have experience with night time telescopes, as you can see I included a photo of my Orion 130St Reflector that came with an equatorial mount.  I contacted Lunt (who were VERY helpful) who suggested purchasing a dovetail to use to mount my solar telescope to my nighttime telescope's mount.

I felt bad pestering them with further questions, and I'm sure there are several ways to do what I'm asking, so that's why I joined this discussion forum.  My question is, once I purchase this dovetail accessory (if someone could suggest specifically WHICH dovetail I need, that would be super helpful) how do I attach it to my equatorial mount?  Which pieces do I dissassemble and then how do I reassemble it for solar viewing?  Links to a site where I can purchase this dovetail accessory would be greatly appreciated.

Question 2: It comes with a 20mm eyepiece.  Would a different eyepiece help me get better views of the sun?  Since it was a gift I'd be more than happy to splurge on some extra goodies.  Any and all suggestions are welcome.  Thanks!

Jim

20160726_161913.jpg.crdownload

20160726_161938.jpg.crdownload

Share this post


Link to post
Share on other sites

Hi Jim,

This is the dovetail you need: https://www.firstlightoptics.com/lunt-solar-accessories/lunt-dovetail-bar.html

Unfortunately, FLO do not ship to the USA so you will have to find one on that side of the pond. The Lunt part number is 0554401.

I cannot open your pictures so can't comment on how you would fix the Lunt to it. Could you please try posting the pictures again as .jpg images?

Derek

 

Share this post


Link to post
Share on other sites

Hi Jim,

The dovetail screws onto the black collar/ring that is fitted around the white part of the tube. You can see the holes that it fits to in the first picture you have posted. You can alter the position of the scope in the collar by loosening the hex bolts on the sides, moving the scope to where you want it and then re-tightening the bolts.

Your current scope looks to be fitted to the tripod using a similar dovetail. You should be above to find one or two knurled screws on the mount just under the telescope tube that will be holding the dovetail into its clamp. If you remove the telescope your Lunt (once fitted with a dovetail) will slot right into the same clamp.

As for eyepieces, the most powerful I use is an 8mm. It might be a good idea for you to order the Lunt 7.2mm to 21.5mm Zoom to give you a range of magnification without having to switch eyepieces.

Derek

Share this post


Link to post
Share on other sites

Ahh!  Very Cool Derek!  I'm chatting with Faye from Lunt right now about choosing the correct sized dovetail.  Once I have that, I'll remove my orion, attach the dovetail to my lunt, and hopefully it slides right in.  I'll also look up the eyepiece you mentioned.

Thank you very very much.

Jim

  • Like 1

Share this post


Link to post
Share on other sites

Wow, that's one heck of a gift!  Good luck getting set up.  Have you considered Lunt's 7.2-21.5mm zoom eyepiece?

Jayne

 

Edited by The Head Gardener
correct typo :)
  • Like 1

Share this post


Link to post
Share on other sites

@jayne I DEFINITELY ordered the zoom eyepiece! I bought it along with the 4inch dovetail they said I needed to attach it to the mount I own.

So I've received the dovetail but I'm lost.  Requesting help again.
1. Which side of the dovetail goes towards the telescope? (edit: I'm fairly sure it's the smooth side)
2. How does it attach to the mount I own?
3. What size screws do I need to attach the dovetail to the telescope? (edit: 1/4in wide, figured that out)
4. Do I need to take anything off of the mount before I attach the telescope w/dovetail or does it just slip into some sort of slot?


Thanks!  Jim20160809_184006.jpg20160809_184029.jpg

Edited by JimmyT123
home depot guy helped me out

Share this post


Link to post
Share on other sites

Jimmy,

There are four videos on YouTube put up by Lunt.  Hope this link works. If it doesn't, then just search YouTube for the  'Lunt Solar Systems"  channel.

https://www.youtube.com/channel/UCIP-sBB1PuiKgRqJB_iJ9kg

One of them shows how to attach the dovetail.

Jayne

Edited by The Head Gardener
added more info

Share this post


Link to post
Share on other sites

Jimmy,

The side of the dovetail with the ridges on the outside and smooth recess in the middle goes towards the scope. The two central holes on the dovetail fit to the two outer holes on the clamp on the scope. You need two short M5 or M6 hex bolts (sorry, can't remember which).

On the mount you can see a black knob on the opposite side from your hand. It looks like that bolt is clamping the existing dovetail (the bar with the large rings attached) to the mount. Unscrew that bolt and the dovetail and rings should come off. The Lunt dovetail should slot into the same clamp.

It is possible that the bolts that are holding the rings to the existing dovetail will be the size you need to fit the new dovetail to the Lunt :wink:

Derek

Share this post


Link to post
Share on other sites

@Jayne the videos were very helpful, but sadly they make it look like my mount may not be suited for any telescope other than the one it came with.

@derek the black knob, when loosened, only allows for rotation of the telescope (you can see the dial just under the knob, it rotates around that axis).
It appears as though this mount is not designed to allow for other telescopes to be attached to it.

Again, thanks everyone for your help.  I might need to buy another mount for my new LS50THa.  I'm going to post one more round of pictures to see if anyone has any other advice before I purchase a new mount tho.

Thank you,  James

20160810_121211.jpg

20160810_121227.jpg

20160810_121233.jpg

Share this post


Link to post
Share on other sites

James,

You might still be able to use this mount :smile:

In the first of the three pictures you just posted you can see that the bar that is holding the large rings is fxed to the mount by two black bolts. If the centers of those bolts are 34mm apart you could buy and attach a clamp like the one linked to below, which would fit the Lunt dovetail.

http://agenaastro.com/gso-dovetail-mount-dovetail-bar.html

Other sizes are available if this wouldn't fit your mount.

Derek

 

Share this post


Link to post
Share on other sites

Jimmy, sorry the videos did not provide an easy solution for you.  I am far too novice to offer you any other advice, other than to say listen to what folk at SGL tell you. In the short time I have been here I have found this a knowledgeable, kind and incredibly helpful forum.

Good luck.

 

Share this post


Link to post
Share on other sites

@Jayne  I LOVE the skywatching community.  I can't wait for the day where I'm knowledgable enough to pay it forward and help a newbie.  Once I have more $ to spend on the hobby and I can have some more gadgets to give advice on, I'll be prancing through these forums spreading seeds of knowledge lol.  Thanks for your help.

@Derek  I see the screws you're talking about.  After looking at the contraption, I think I'm going to leave my mount in one piece and probably invest in another tripod/mount for my solar telescope so that I don't have to take the mount apart and put it back together when switching from daytime to nighttime viewing.

That said, I'm now shopping for new mounts that I can clip my new dovetail into lolol

Thanks again fam

James

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By Michael Hogan
      I have decided to sell my Cem-120 mount as i got a second hand AP 1100 GTO from my friend who got a new AP 1600 with encoders
      its just under a year old bought from Altair Astro so still under two year warranty is in mint cont i couldn't miss the opportunity to get
      AP 1100 GTO and let it go still waiting for pier plate for mount.
      So theirs no point in keeping two large mounts after i got my dream final mount buyer will pay shipping price is 2150 pounds.
      Altair Astro price without Ipolar Camera is 3250 pounds without Ipolar Camera which is 200 pounds total 3450 pounds
       

    • By BabyPepper
      160mm x 1600mm + Lunt LS50C etalon.
      Thanks for looking!
            <br>    

       
    • By Clear Skies!
      I am going to buy Skywatcher EQ5 Pro Go-To mount. But, unfortunately, I am low on budget.
      So, does someone know where can I buy the cheapest EQ5 pro mount?
      Yesterday there was a low price for it (350 €), but they changed it.
      Thank you for your time!
    • By vineyard
      Hello,
      I recently bought a 2nd hand Lunt 50PT Ha (on a different platform).  The vendor said he had only used it a handful of times since buying it and it shipped in the original box.  It seems fine, focuses well (although I find the helical focuser a bit of a pain compared to crayfords).  But it doesn't show any Ha features on the surface of the Sun!
      Long story short, I completely opened up the pressure tuner and found a bizarre thing.  Its well greased, there's no detritus (and it doesn't lose pressure).  But there was only one O-ring in it?!  The tuner itself has grooves for two o-rings and the video on Lunt's website (on how to replace o-rings) shows a tuner with two o-rings when it comes out.  And they ship replacements in batches of two.
      So I'm guessing that somehow the original scope shipped with only one o-ring fitted? (It wouldn't make sense for the vendor to have removed one?).
      I'm hoping that's what it is, b/c then the inability to resolve Ha features may just be insufficient pressure building up?  In which case, does anyone know where I can get these replacement o-rings please (Lunt's US website has them but that's only for shipping to the US)?
      If it's not that, and the scope is only meant to have one o-ring, any ideas on the problem?  The ring & tuner seem well greased.
      Thank you!
      Vin
      (EDIT: in the meantime, the next time the sun comes out, I'm going to try moving the current o-ring from the higher groove to the lower groove in case that longer distance from the base is why the pressure isn't building up sufficiently?)
    • By Phillips6549
      We have a fledgling Astronomical Society at my place of work and we're intending to have some telescopes available for colleagues to view the transit of Mercury in November.  While the majority will use appropriate solar filters it would be good to have at least one set up for projection.  However, we only have reflectors and Schmitt or Maksutov Cassegrain scopes among the members.  I was considering buying a small refractor second hand to use for this but thought I'd ask for advice here first.
      Which is the best type of scope to use for projection?
      What do we need to look out for (overheating & fire risks for example)?
      What is the best umbrella to protect kit from the inevitable deluge on the 11th November? ☔
       
      Thanks
      Mark
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.