I have two scopes I want to use side-by-side or tandem with my Celestron equatorial mount Can I do that?

Yes, you can! Tandem support (the ability to turn the Dec axis 90 degrees and mount multiple optical tubes side-by-side) is now available for firmware versions GEM 4.15 and higher for Celestron’s German equatorial mounts.

It is under Scope Setup > OTA Orientation.  You choose the tandem settings before aligning your scope. There are three options:

  • Normal is regular use of the scope without any tandem bar-scopes on the mount. 
  • East is used when your scopes are facing east when the declination index marks are aligned. 
  • West is used when your scopes are facing west when the declination index marks are aligned.
Updated 12/27/13