Knowledge Base
Find answers fast. Our comprehensive knowledge base is your go-to resource for getting the most out of your Celestron product.
Caring for Your Celestron Telescope: How to Maintain, Store, and Ship Yo...
Taking good care of your Celestron telescope will prolong its lifespan, giving you more time under the stars. It’s important to learn how to perform regular maintenance, store your scope...
Caring for Your Celestron Telescope: How to Maintain, Store, and Ship Yo...
Taking good care of your Celestron telescope will prolong its lifespan, giving you more time under the stars. It’s important to learn how to perform regular maintenance, store your scope...
Which scope aperture is best for different kinds of objects?
While small telescopes can show a lot of objects, they may only be seen as colorless dots or smudges. Size does matter in astronomy–bigger is better in many cases. The...
Which scope aperture is best for different kinds of objects?
While small telescopes can show a lot of objects, they may only be seen as colorless dots or smudges. Size does matter in astronomy–bigger is better in many cases. The...
The Ultimate Guide to Celestron Optical Tubes
From refractors to reflectors to Cassegrains—there are so many telescope optical designs to choose from, each with its unique advantages and disadvantages. In this guide, our experts break down eac...
The Ultimate Guide to Celestron Optical Tubes
From refractors to reflectors to Cassegrains—there are so many telescope optical designs to choose from, each with its unique advantages and disadvantages. In this guide, our experts break down eac...
RASA 8 Questions and Answers
Why can’t the Rowe-Ackermann Schmidt Astrograph (RASA) 8 be used visually?The optics produce an image at the front end of the telescope, not the back. Therefore, you cannot look through...
RASA 8 Questions and Answers
Why can’t the Rowe-Ackermann Schmidt Astrograph (RASA) 8 be used visually?The optics produce an image at the front end of the telescope, not the back. Therefore, you cannot look through...
Why does there appear to be a black circle in the middle of my image whe...
If you can see the shadow of the secondary mirror (black circle) and/or spider vanes while viewing through the eyepiece, the telescope is not focused. Turn the focusing knob until the...
Why does there appear to be a black circle in the middle of my image whe...
If you can see the shadow of the secondary mirror (black circle) and/or spider vanes while viewing through the eyepiece, the telescope is not focused. Turn the focusing knob until the...
Why is my Telescope Showing Everything Upside Down? Is There Something W...
If your viewing target is upside down when you use your telescope, don’t be alarmed! Astronomical telescopes are designed to produce an upside-down or inverted image. There's no need to...
Why is my Telescope Showing Everything Upside Down? Is There Something W...
If your viewing target is upside down when you use your telescope, don’t be alarmed! Astronomical telescopes are designed to produce an upside-down or inverted image. There's no need to...