My image shifts when I’m focusing my SCT and after I get a great focus, ...

All Celestron SCTs and some Maks adjust focus by sliding the primary mirror along a set of nesting baffles inside the main tube. This is done by an arm to...

My image shifts when I’m focusing my SCT and after I get a great focus, ...

All Celestron SCTs and some Maks adjust focus by sliding the primary mirror along a set of nesting baffles inside the main tube. This is done by an arm to...

Why won’t my erect image eyepiece or diagonal always give right side up ...

Image erectors won’t work in all circumstances. The orientation of the image produced by your scope depends on its optical design and its orientation. Though optics of many scopes create...

Why won’t my erect image eyepiece or diagonal always give right side up ...

Image erectors won’t work in all circumstances. The orientation of the image produced by your scope depends on its optical design and its orientation. Though optics of many scopes create...

I need to box up my scope and ship it. What’s the best way to pack it?

Here is a summary of rules experts recommend for safe shipping of fragile optics and electronic equipment. Pack your item to survive a fall of 10 feet, not just to...

I need to box up my scope and ship it. What’s the best way to pack it?

Here is a summary of rules experts recommend for safe shipping of fragile optics and electronic equipment. Pack your item to survive a fall of 10 feet, not just to...

My CGEM mount won’t let the front latitude screw lock the mount. What’s ...

If you are using the mount at 35 degrees latitude and the front latitude screw won’t lock, this is normal for the CGEM. Here’s why.The CGEM has two latitude adjustment...

My CGEM mount won’t let the front latitude screw lock the mount. What’s ...

If you are using the mount at 35 degrees latitude and the front latitude screw won’t lock, this is normal for the CGEM. Here’s why.The CGEM has two latitude adjustment...

I upgraded/ re-flashed my Nexstar* hand control and now I’m not getting ...

You probably flashed it with the wrong version of firmware or one for another mount. When you do this, you may get the telescope model displayed correctly when your scope...

I upgraded/ re-flashed my Nexstar* hand control and now I’m not getting ...

You probably flashed it with the wrong version of firmware or one for another mount. When you do this, you may get the telescope model displayed correctly when your scope...

I have an old telescope with the Celestron brand on it. How do I know wh...

You can try these suggestions:1. Look at our current model line to see if it is actually still a model we sell. Even if it is not a current model,...

I have an old telescope with the Celestron brand on it. How do I know wh...

You can try these suggestions:1. Look at our current model line to see if it is actually still a model we sell. Even if it is not a current model,...