What is the correct value for the tracking error of the CGE Pro mount?

The typical tracking accuracy for the CGE Pro is +/- 3 arcseconds without the use of guiding or PEC (periodic error correction). This is not a guaranteed specification, but it’s...

What is the correct value for the tracking error of the CGE Pro mount?

The typical tracking accuracy for the CGE Pro is +/- 3 arcseconds without the use of guiding or PEC (periodic error correction). This is not a guaranteed specification, but it’s...

Why does my hand control show the message “There are no objects availabl...

Celestron’s NexStar hand control firmware uses both slew limits and filter limits to select observable objects among all objects in its database. These functions give lists of objects for alignment...

Why does my hand control show the message “There are no objects availabl...

Celestron’s NexStar hand control firmware uses both slew limits and filter limits to select observable objects among all objects in its database. These functions give lists of objects for alignment...

Will a 2 in eyepiece fit my 130SLT?

Yes, a 2” eyepiece will fit into a NexStar 130SLT with the included 2” adapter.

Will a 2 in eyepiece fit my 130SLT?

Yes, a 2” eyepiece will fit into a NexStar 130SLT with the included 2” adapter.

I assembled my PowerSeeker 114AZ and it won’t move upwards. What have I ...

You probably installed the tube upside down. Here are a series of pictures to show the proper and improper tube orientations.This is how the scope should look when fully assembled....

I assembled my PowerSeeker 114AZ and it won’t move upwards. What have I ...

You probably installed the tube upside down. Here are a series of pictures to show the proper and improper tube orientations.This is how the scope should look when fully assembled....

Does my AstroMaster 130 have a spherical or parabolic mirror? What is th...

The AstroMaster 130 has a spherical mirror. Telescope mirrors are described by their figures in terms of the curvature of the optical surface. A spherical figure is one type of...

Does my AstroMaster 130 have a spherical or parabolic mirror? What is th...

The AstroMaster 130 has a spherical mirror. Telescope mirrors are described by their figures in terms of the curvature of the optical surface. A spherical figure is one type of...

What is the size of the threading holding the visual back to my Schmidt-...

The baffle lock nut is the back end of the C8 and C9.25; it is a 2 in x 24 thread.On the C11 and C14 (and the EdgeHD 9.25), there...

What is the size of the threading holding the visual back to my Schmidt-...

The baffle lock nut is the back end of the C8 and C9.25; it is a 2 in x 24 thread.On the C11 and C14 (and the EdgeHD 9.25), there...