Popular Articles

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Which scope aperture is best for different kinds of objects?

How do I replace the NexStar GPS telescope's internal battery?

Your NexStar GPS has a GPS module with a small rechargeable Panasonic ML621 battery clipped or soldered to an internal board. It keeps the date and time and recent data...

How do I replace the NexStar GPS telescope's internal battery?

Your NexStar GPS has a GPS module with a small rechargeable Panasonic ML621 battery clipped or soldered to an internal board. It keeps the date and time and recent data...

How do I collimate my SLT 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 SLT 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 use my telescope eyepieces?

How do I use my telescope eyepieces?

Your eyepieces are the first accessories you should learn to use with your telescope. Eyepieces have different diameters that allow you to view objects through your telescope at a variety...

How do I use my telescope eyepieces?

Your eyepieces are the first accessories you should learn to use with your telescope. Eyepieces have different diameters that allow you to view objects through your telescope at a variety...

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...