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Losmandy dual sided dovetail plate

Mount Solar Celestron
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#1 jcschultz01


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Posted 04 March 2024 - 02:37 PM

For the upcoming eclipse I want to use both my Celestron C9.25 (w reflective solar filter) and Lunt solar telescope but was only taking one mount.


I considered a side-by-side mount but worried about the weight of the C9.25 + equipment that far off axis (at least 25 lbs for the C9.25 without guidescope and computer).


But my C9.25 had an upside-down Losmandy dovetail on top of the telescope where I usually attached a guide scope and a local astro computer (to simplify and shorten cabling). 


My solution was to make a homemade Losmandy double sided dovetail plate with one side milled out for the Lunt Losmandy plate - see DetailOfDualDovetails picture.
Table saw at a 30 degree angle to cut the Losmandy grooves, sneaking up on the width to get a tight but sliding fit. Clean out the center with a router, dado or a lot of table saw passes. 


With the double sided dovetail plate, I could mount the Lunt solar scope on top of the C9.25 in place of the computer and the guide scope.
For solar tracking, I have the white solar tracker on top of the entire rig which works very nicely to track the sun and directly guides the EQ6-R pro mount (second picture with blue tape over the optical aperture).


Should be within weight limits of the EQ6-R Pro since I moved the local astro computer off the telescope using longer cabling and the EQ6-R pro handle attach points for securing the astro computer.  I put the astro guide camera UNDER the C9.25 though I might still remove it depending on weight. 


Just thought I would pass along the idea.  It seems to work well though of course it is cloudy today and I can't verify operation. Somewhat concerned about accurate alignment of the two telescopes but the sun does not fill either field-of-view so unless the co-alignment is REALLY bad I should be OK. 


Took longer than I expected (what else is new) but cutting the dual sided dovetail plate was not bad. Just sneak up on the correct width/spacing.

Attached Thumbnails

  • 20240304 DetailOfDualDovetails.jpg
  • 20240304_ DualLosmandyDovetailsOnC9.25withSolarTelescopeClampsGuideScopeUnderneath.jpg

#2 deSitter


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Posted 04 March 2024 - 03:51 PM

Have you ever seen a total eclipse? It's amazing how fast 2-4 minutes can go by! I would concentrate on one telescope and enjoy the experience. Because regardless of what you've read, it's better!


I am taking my ETX90 and leaving the heavy hitters at home!



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