Compression ring on skywatcher 72ed

[Simon Dunsmore]

Hi Folks,

I'm a little concerned about securing the image train on my Skywatcher 72ed. I have a ovl field flattener, zwo 533mc and spacers.

The stock fitting is pretty poor. I looked into a baader clicklock but, a. These don't seem to come with the right thread and, b. They're really expensive. I was wondering if anyone has experience fitting the ovl into one of these? I read somewhere that the tapered nose of the flattener may cause the compression ring to not grip??

https://www.firstlightoptics.com/adapters/astro-essentials-2-inch-compression-ring-adapter-for-sky-watcher-newtonians-and-72ed-refractor-m54.html

Any other suggestions welcome!

Thanks in advance 

Simon 

[fozzybear]

1 hour ago, Simon Dunsmore said:

Hi Folks,

I'm a little concerned about securing the image train on my Skywatcher 72ed. I have a ovl field flattener, zwo 533mc and spacers.

The stock fitting is pretty poor. I looked into a baader clicklock but, a. These don't seem to come with the right thread and, b. They're really expensive. I was wondering if anyone has experience fitting the ovl into one of these? I read somewhere that the tapered nose of the flattener may cause the compression ring to not grip??

https://www.firstlightoptics.com/adapters/astro-essentials-2-inch-compression-ring-adapter-for-sky-watcher-newtonians-and-72ed-refractor-m54.html

Any other suggestions welcome!

Thanks in advance 

Simon 

Simon, Have a read of this thread may shed some light

Andy

 

[Simon Dunsmore]

Hi Andy,

Thanks for your reply. Looks in theory that this would work. But this is a different bit of kit to the compression ring and looks to be discontinued. I'd still be interested to know if any has used the compression ring with the OVL.

Thanks again 

Simon

[fozzybear]

https://www.firstlightoptics.com/adapters/sky-watcher-evoframe-camera-rotator-for-evostar-72ed-ds-pro.html

[Pitch Black Skies]

I use that exact 2" compression ring to hold a coma corrector and it is super secure and plumb.

However, I have modified it with the addition of a 3rd thumbscrew for equal pressure. 10 minute job if you have the tools and makes the world of difference.

HTH

[Simon Dunsmore]

Hi, Nice job!!

[Pitch Black Skies]

Thanks!

The little mod really helps to keep everything centered.

If it's something you might consider doing you will just need a 3.3mm drill bit and an M4 tap.

If it's something you're not comfortable doing yourself I would be glad to help if you post it to me 👍

[Simon Dunsmore]

Hi,

Thanks, that's very kind and much appreciated. I have ordered a slightly different model, but may come back to you if that's OK.

Cheers 

Simon