Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Celestron Nexstar SE8 Mount on Celestron (old style) C8 Wedge

  • Please log in to reply
5 replies to this topic

#1 _me

_me

    Sputnik

  • -----
  • topic starter
  • Posts: 26
  • Joined: 20 Jan 2019

Posted 23 January 2019 - 04:31 AM

I know that i'm better off with an eq mount--but that's a fairly major purchase that my wife will need to approve...  that said to begin with AP I need some approximation of an EQ mount on a small budget.  I'm looking into ( https://astromart.co...c8-wedge-389301 ) the old C8 wedge from Celestron.

 

I know, I know...  get a decent EQ mount (please see above approval required)...  

 

I just need to know if the nexstar mount for a Celestron SE8 will fit on the wedge...  barring that does anyone know of cheap and dirty redneck engineering methods to make it fit?


Edited by _me, 23 January 2019 - 04:32 AM.


#2 Thomas Marshall

Thomas Marshall

    Messenger

  • *****
  • Posts: 474
  • Joined: 24 Feb 2015
  • Loc: Spring Valley AZ.

Posted 23 January 2019 - 05:03 AM

I know that i'm better off with an eq mount--but that's a fairly major purchase that my wife will need to approve...  that said to begin with AP I need some approximation of an EQ mount on a small budget.  I'm looking into ( https://astromart.co...c8-wedge-389301 ) the old C8 wedge from Celestron.

 

I know, I know...  get a decent EQ mount (please see above approval required)...  

 

I just need to know if the nexstar mount for a Celestron SE8 will fit on the wedge...  barring that does anyone know of    cheap and dirty redneck engineering methods to make it fit?

The only "cheap and dirty redneck engineering method to make it fit" that I can think of IS, - Grab a 6 pack of beer, - a sledge hammer, and "Get Er Done". 


  • _me likes this

#3 pkrallis

pkrallis

    Vostok 1

  • *****
  • Posts: 177
  • Joined: 06 Oct 2007
  • Loc: Colorado Springs, CO

Posted 23 January 2019 - 05:26 AM

I've seen both SE and CPC 8" on wedges.  A ruler should tell the story.


  • Dynan likes this

#4 _me

_me

    Sputnik

  • -----
  • topic starter
  • Posts: 26
  • Joined: 20 Jan 2019

Posted 23 January 2019 - 08:04 AM

Thanks pkrallis,

 

I don't have access to the C8 wedge in person or I would grab the tape and measure...  was hoping for a little info from the more experienced.

 

Maybe best is to ask the seller(s) to take a few measures for me.

 

I appreciate the help.

 

 

 

Thomas, I will definitely keep it in mind if all else fails!


Edited by _me, 23 January 2019 - 08:05 AM.


#5 _me

_me

    Sputnik

  • -----
  • topic starter
  • Posts: 26
  • Joined: 20 Jan 2019

Posted 31 January 2019 - 12:50 AM

after searching through some old blogs what i've been able to find is that the wedge should be a good fit. 

 

there is a pin in the center of the wedge that was used to center and spin it for fine adjustments in azimuth...  this pin needs to be pushed out and the rest should fit the mount and tripod without difficulty... 

 

I'll drop word here again when i've managed to actually assemble everything and verify that...



#6 _me

_me

    Sputnik

  • -----
  • topic starter
  • Posts: 26
  • Joined: 20 Jan 2019

Posted 24 March 2019 - 07:31 PM

These are some video of the modifications i made to the older C8 wedge to accommodate the modern alt-az mount.  My lat is about 36 degrees, any lower than that and further modifications would need to be made to account for the larger size of the base compared to older Celestron C8 mounts.

 

I drilled two holes to add fine azimuth adjustment and used 5/16 bolts and nuts to create the adjustment screws--this works surprisingly well.  I was easily able to get the mount polar aligned and taking longer shots (30 seconds).

 

https://www.youtube....h?v=9L6AETXjv_Y

 

https://www.youtube....h?v=87uZvuLuLLU

 

for the centering pin i used a a dowel very similar to this one--3/8th thick with (don't quote me) a 4mm center bolt reciever to fit over the centering pin on the tripod.  This works very well to keep the mount from slipping around on the tripod while aligning.

 

https://www.lawsonpr...el-Pin/58030.lp

 

Thanks to all that dropped by and left a line.  I hopw this information might be useful to someone in the future.




CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics