Knowledgebase

01/31/19

I need a shutter release cable for my Nexstar 4/5SE mount. Where can I find one?

01/03/19

What's the difference between Variable Polarizing filter, the Neutral Density Moon filter, and the Moon filter?

12/27/18

RASA 8 Questions and Answers

12/05/18

Why does my SkyScout display error message about magnetic fields from my location?

11/29/18

Why is the time being displayed in the hand control incorrect?

11/29/18

Why does there appear to be a black circle in the middle of my image when I look at a star or planet?

11/29/18

Why can't I see anything in my telescope when I have the Moon centered in the crosshairs of my finderscope?

11/26/18

How does a Maksutov-Cassegrain (MAK) telescope work?

11/20/18

Can eyepiece filters be used with the Regal spotting scopes?

11/19/18

Is my Celestron telescope Fastar compatible?

11/16/18

What does magnitude mean?

11/16/18

What is a waterproof spotting scope?

11/16/18

Why is my NexStar SLT optical tube slipping in altitude?

11/15/18

Why is my FirstScope showing everything upside down? Is there something wrong with it?

11/15/18

Why does my telescope rings have a missing screw?

11/15/18

Why do I only see stars as points of light even when using my highest power eyepiece?

10/16/18

Benefits of a Bigger Aperture

10/05/18

My telescope slews erratically and it's not locating objects. What can I do?

10/05/18

How can I use GoTo Approach to minimize backlash with mymount?

10/04/18

Can I motorize my manual EQ Mount?

10/02/18

Can my NexStar hand control be repaired instead of replaced?

09/28/18

How do I clean my telescope optics – primary mirrors, lenses, eyepieces, corrector plates?

09/27/18

NexYZ Tension Adjustment Guide

09/18/18

How do you Align your EQ Mount?

09/18/18

How do you Polar Align using an Alt-Az Mount?

09/18/18

How do you Polar Align using an EQ Mount?

09/18/18

How do you Align your Alt-Az Mount with a Wedge?

09/18/18

How do you Align and Polar Align using a manual EQ Mount?

09/12/18

What is Exit Pupil and Eye Relief for Sport Optics?

07/03/18

What is a Diffraction Spike?

07/02/18

Should I use an ALT-AZ or equatorial mount?

06/18/18

What is the T-Mount system? What are T-Adapters and T-Rings?

06/12/18

My NexStar+ hand control is stuck displaying “Initializing….” What can I do?

06/12/18

My NexStar hand control is stuck displaying “Initializing….” What can I do?

05/22/18

How do Celestron PowerTanks compare against each other?

05/16/18

What are the AUX ports on my computerized telescope for?

05/15/18

How do I balance my telescope on an Equatorial mount?

05/14/18

Smartphone Adapter Tips

05/08/18

What kind of dovetail does my telescope have? Can I use it with other mounts?

05/01/18

Why don't the images I see through my telescope look the same as photos I see taken with the same type of telescope?

04/24/18

Why is the view through my high-power binoculars and spotting scope so blurry?

04/17/18

What are the differences between the optical coatings?

04/10/18

I'm having trouble focusing my NexStar SE telescope

04/03/18

NexYZ Imaging Tips and Tricks

04/03/18

What resolution can I expect to get from my binoculars?

03/27/18

Can I transfer images from the internal memory of my Digital Microscope to an SD card loaded in the SD card slot on the unit?

03/20/18

My Celestron Ultima and Regal spotting scopes have threads in front of the objectives. What size photo filters do they use?

03/13/18

I am using rechargeable batteries with my Celestron GoTo mount, and the mount will not power up even though the batteries are new and fully charged. What’s the problem?

03/06/18

How do I calculate magnification for my microscope?

02/27/18

What is the diameter (objective size) of a pair of binoculars?