Popular Articles

How to Determine Which Eyepieces to Use with Your Telescope
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?

What do I need to know about my NexStar SLT and batteries?

The NexStar SLT has a battery compartment in the base of the mount that uses 8 AA-size batteries. While this is the easiest way to power the scope, there are...

What do I need to know about my NexStar SLT and batteries?

The NexStar SLT has a battery compartment in the base of the mount that uses 8 AA-size batteries. While this is the easiest way to power the scope, there are...

What are the Narrowband and Light Pollution Reduction eyepiece filters?

These eyepiece filters either selectively transmit or reduce the transmission of specific parts of the spectrum of light to increase contrast and visibility of deep-sky objects like nebulas and gal...

What are the Narrowband and Light Pollution Reduction eyepiece filters?

These eyepiece filters either selectively transmit or reduce the transmission of specific parts of the spectrum of light to increase contrast and visibility of deep-sky objects like nebulas and gal...

How do I collimate my refractor telescope?

Collimation is the proper alignment of the optical elements–lenses and mirrors in your telescope. Collimation is important for getting the best out of your scope. Poor collimation will result in...

How do I collimate my refractor telescope?

Collimation is the proper alignment of the optical elements–lenses and mirrors in your telescope. Collimation is important for getting the best out of your scope. Poor collimation will result in...

How do I collimate my Newtonian – aligning the mirrors in daylight?

Collimation is the proper alignment of the optical elements – lenses and mirrors in your telescope. Collimation is important for getting the best out of your scope. Poor collimation will...

How do I collimate my Newtonian – aligning the mirrors in daylight?

Collimation is the proper alignment of the optical elements – lenses and mirrors in your telescope. Collimation is important for getting the best out of your scope. Poor collimation will...

I can’t see anything clearly through my telescope at night – help!

I can’t see anything clearly through my telescope at night – help!

If you can’t see anything clearly through your telescope at night, try using the scope in daylight first. It is much easier to familiarize yourself with focusing, aiming the telescope...

I can’t see anything clearly through my telescope at night – help!

If you can’t see anything clearly through your telescope at night, try using the scope in daylight first. It is much easier to familiarize yourself with focusing, aiming the telescope...

How do I use an equatorial mount for terrestrial observing?

It’s awkward to use an equatorial mount for viewing terrestrial objects, as any sweeping movement to the left or right will have the tube moving upwards or downwards. Try raising...

How do I use an equatorial mount for terrestrial observing?

It’s awkward to use an equatorial mount for viewing terrestrial objects, as any sweeping movement to the left or right will have the tube moving upwards or downwards. Try raising...