7 replies to this topic

[TerryD1]

I recently bought an Astrotech AT72ED II to do imaging with.  I’m not going to list the whole imaging train but with everything attached I can’t get the scope far enough forward to balance because the right focus knob runs into the mount clamp before it’s anywhere close to balancing.  Anyone have a solution for me?  

[ex-Bubblehead]

Rotate the scope in the rings until you can clear the clamp. My 72 is all kinds of cockeyed if you look at the focuser, but it doesn't really signify in the end since they have that camera angle adjuster...

Edited by ex-Bubblehead, 03 February 2023 - 09:51 PM.

[MGAR]

Here is my example...

 

[TerryD1]

That won't work for me because I have a guide scope and ASIAIR PLUS mounted to the scope.  After doing a little research I think I'm going to have to get a longer rail and ring risers.

[Koop]

I had similar issues with my W.O. ZenithStar 73III. I mounted the Vixen dovetail on a Losmandy D 9" plate - giving me plenty of clearance for the focuser. The HEQ5 mount is solid and rock steady with this arrangement. I have an Altair 60mm guidescope on top.

 

[rexowner]

Longer dovetail and rotate the focuser out of the way.  Plenty of options out there.

 

Optionally risers from ADM or Stellarvue and the focuser can be above the dovetail

if you find that more comfortable

https://www.admacces...e-riser-blocks/

https://www.stellarvue.com/risers/

 

Edit: IIRC, the AT72ED II took the metric M6 screws for these risers.  I originally ordered the wrong ones.

Edited by rexowner, 04 February 2023 - 11:24 AM.

[TerryD1]

Thanks, I was wondering if a losmandy plate would raise it high enough.  That’s even my mount.

 

Edited by TerryD1, 04 February 2023 - 07:04 PM.

[Mark Lovik]

I setup some spacers (3/4 of an inch or more) between the mounting plate and rings.

Purchased a longer mounting plate.  The stock plate is a bit short to balance the back heavy rig.

Edited by Mark Lovik, 05 February 2023 - 02:37 AM.