Popular Articles

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SCT & EdgeHD Collimation Guide
Aligning Your Celestron Finderscope: A Step-by-Step Guide
Why is my Telescope Showing Everything Upside Down? Is There Something Wrong with it?
Which scope aperture is best for different kinds of objects?

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,...

My NexStar SE wobbles when I put it on the tripod. How can I fix this?

The NexStar SE tripod and mount are attached to one another by three bolts that are part of the tripod assembly. In order to make assembly easier, especially in the...

My NexStar SE wobbles when I put it on the tripod. How can I fix this?

The NexStar SE tripod and mount are attached to one another by three bolts that are part of the tripod assembly. In order to make assembly easier, especially in the...

What are celestial coordinates, and why are they important?

From our point of view on Earth, the sky is a sphere. If you stretch out or project the geographical coordinates of Earth into space, a gridwork of celestial coordinates...

What are celestial coordinates, and why are they important?

From our point of view on Earth, the sky is a sphere. If you stretch out or project the geographical coordinates of Earth into space, a gridwork of celestial coordinates...

Where do I find infrared (IR) and ultraviolet (UV) transmission and refl...

We don’t have the data for regions outside the visible spectrum, since our products are marketed for amateur astronomy.Please go to any Celestron Optical Tubes page, choose any scope and...

Where do I find infrared (IR) and ultraviolet (UV) transmission and refl...

We don’t have the data for regions outside the visible spectrum, since our products are marketed for amateur astronomy.Please go to any Celestron Optical Tubes page, choose any scope and...