Question about Telescopes

1 Answer

I have an old (1992) Celestron 8" SC. Haven't used it in many years. The surface of the eyepieces (30 mm, 12 mm, and 9mm) look like they have small spider web markings. Is this something I should be concerned about?

Posted by on

  • wmichne Jan 11, 2009

    As suggested, I cleaned the eyepieces using lens cleaner and lens tissues. Problem solved! Thanks!


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 3,185 Answers

The eyepieces are dirty-- try cleaning them. They should be "clear" glass with a blue or slightly green coating. Some eyepieces are perfectly clear and not coated. But none have spider webs on them!
How to clean eyepieces--

Posted on Jan 11, 2009

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Which lens is more powerful..a 10mm or a 20mm?

A 10 mm. If you know the focal length of your scope, divide that by the focal length of the eyepiece, and the answer is the magnification you will get. However bear in mind when viewing astro objects, a very high magnification will degrade the image sharpness, and make the object hard to get on centre. Most experienced amateur astronomers use a medium power eyepiece at most.

Mar 08, 2014 | Celestron AstroMaster 114 AZ (50 x 114mm)...

1 Answer

Meade model 6600 need eye pieces

This telescope has a 1.25" eyepiece holder. This is standard, many brands are available. If you are just getting started a few eyepieces are all you need. I recommend Plossl or Super Plossl at approximately 32 mm, 12.5 mm, and something from 6-9 mm, but this really depends on what you are looking at most often. Add one Barlow and you have the equivalent of 6 eyepieces.

When I was getting started, I bought a simple kit from Zhumell (Lunar and Planetary) which came with barlow, moon filter and several other filters. These are better than the cheap plastic ones that come with low end telescopes, but still very affordable and reasonable quality for beginner/intermediate users. Celestron, Meade, and others have similar kits, and smaller ones if you are on a budget. Used lenses can be found on Astromart classifieds and Cloudy NIghts or other astronomy forums.

More importantly, I bought a good book (Star Watch by Harrison) and spent some time learning how to find things. A telrad (unit-finder) was very helpful too.

Jun 02, 2011 | Telescopes

1 Answer


NEVER EVER disassemble an eyepiece --- no one can tell you how the lenses go together there are dozens of combinations and some eyepieces have as many as 6-8 glass lenses inside!

Sorry buy another eyepiece and only clean the outside surfaces.

Jan 07, 2011 | Celestron AstroMaster 114EQ (100 x 114mm)...

1 Answer

I have the Nexstar 8. It will not auto align or manual....

First do a RESET on the hand controller and make sure TIME, DATE, and SITE, are correct.

If this does not work then RE-load the firmware in the hand controller. If that fails contact Celestron customer service.

May 15, 2010 | Celestron NexStar 102 SLT 102 mm (4.0)...

1 Answer

Need eyepiece etc - don't know what to buy or where to find it

Here is your scope:

It's discontinued: however call Celestron and see if they still have parts?

Good luck.

Sep 12, 2009 | Celestron Telescopes

2 Answers

Not seeing

The city lights will not hamper planetary viewing. Excessive power is a common mis-conception. Use 80x or so for best viewing. That would be about a 4mm eyepiece. Start with lower powers and work upwards in easy steps. The greater the power, the narrower the field of view, and it becomes very hard to find anything at all.

Apr 18, 2009 | Celestron NexStar 130 SLT (306 x 130mm)...

1 Answer

Acquired a used Parks Astronomical Telescope 60 mm - 700 mm. w/90degree eyepiece is a G.S-7 5mm. My 9yr old grandson (a future engineer) decided he wanted to know how it was put together and while I...

Just found your posting kind of old but I hope this helps you--

Most of these small refractors assemble the same way-- so take a look at these Meade brand refractor manual and see if it helps you put it back together.

Feb 18, 2009 | Celestron PowerSeeker 60 Astronomical...

1 Answer

How use a telescope celestron 21041

The power seeker 60's are hard to use a high power due to the 60mm objective. try starting out with a 25mm eyepiece on the moon or some think bright and work from there.

Dec 03, 2008 | Celestron PowerSeeker 60 Astronomical...

Not finding what you are looking for?
Telescopes Logo

Related Topics:

72 people viewed this question

Ask a Question

Usually answered in minutes!

Top Telescopes Experts

Joe Lalumia aka...
Joe Lalumia aka...

Level 3 Expert

3185 Answers

Geoffrey White
Geoffrey White

Level 3 Expert

3961 Answers

kenneth njonjo

Level 3 Expert

1575 Answers

Are you a Telescope Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides