Question about National Geographic Optics

1 Answer

How do I fit an eye piece into the focusing tube of a National Geographic 76mm Reflector telescope where the screw is missing? Any idea where to purchase these specialised screws in Dublin ?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 3,186 Answers

Any well stocked hardware store will have the proper "thumb" type screw. Take the part with you so you can get the correct thread for the screw. Nothing "special" about the screws.

Posted on Feb 01, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I need a Manual for National Geographic NG114AZ as well as replace the adjuster for the erecting eyepiece. where do I get these>


I think you are asking for a replacement focuser. You can probably find one here: http://www.ebay.com/itm/4-5-or-6-Telescope-Reflector-Tube-1-25-Newtonian-Focuser-Metal-Plastic-NEW-/360936594869?hash=item54097f5db5

A manual is another question. These scopes are imported and no manuals are available. However the manual only has assembly instructions it does not tell you how to use the telescope to find objects in the night sky.

Find a local Astronomy Club and the members will help you set it up-- very easy once you see it done 1 time.

Clear skies.

Jul 08, 2015 | National Geographic Optics

1 Answer

Cannnot see anything through the telescope


I know this may sound really stupid but with old Mead reflector I kept forgetting to take the cap off the tube. Seeing that it sets down inside a bit it's easy to miss.

Nov 18, 2012 | Tasco 49076700 Spacestation(r) 76mm...

1 Answer

NATIONAL GEOGRAPHIC TELESCOPE NG76AZ where can i get a solar filter and additional lenses etc for above 76mm telescope


Do NOT attempt to look at the Sun through a solar filter! These can crack from the heat and you will be blinded instantly.

Most telescopes use a standard fitting eyepiece with a 1.25 inch outside diameter barrel. You can measure the mount where the eyepiece goes to make sure that yours is this size, then search on eBay or Amazon for "1.25 eyepiece" and you will find many available. None of these will be made by National Geographic, but any make will fit.

The other variable will be the focal length of the eyepiece, which is what determines it's power. The power of the scope will be the focal length of the main objective divided by the focal length of the eyepiece, so a 9mm eyepiece will give a higher magnification (and be dimmer and harder to focus and find objects) than a 20mm eyepiece. It is usual to have two or three different focal length eyepieces for viewing different objects.

You will find a large variation in prices, which is partly due to the difference in quality and type of construction of the eyepieces. Kellner eyepieces are simple and cheap, whereas Possl or orthoscopic ones are more complex and cost more. There are reasons why people will pay more for the better eyepieces. Avoid eyepieces marked with the letters "H" or "SR" before the focal length.

Jan 20, 2011 | National Geographic 76AZ (525 x 76mm)...

2 Answers

We have a vivitar reflector tel 76700 not sure in assenbly of eye piece


Just put the eyepiece with the largest number written on it into the focuser. Take the scope outside during the day time and practice focusing on a distant object.

Dec 28, 2010 | Vivitar (1607225) Telescope

1 Answer

How to install the eyepiece


Is your scope like the picture? If it is it is a REFLECTOR style with a mirror on the bottom.

Put the eyepiece into the focuser-- this is the UP end of the telescope. The large mirror is on the DOWN end. I have seen many beginners mount these upside down with the open end pointing at the ground!

Read this:

http://www.texasastro.org/telescope.php

and my TIPS on my profile page.

Sep 08, 2010 | National Geographic 76AZ (525 x 76mm)...

1 Answer

I bought a used Galileo FS-120DX reflector telescope on a garage sale. It is missing the eye-piece, instruction book, screw to attach the scope tube to the tri-pod and possibly some weights that attach to...


You may be able to call Galileo telescopes and order the parts.

http://www.galileosplace.com/

If not and if the eyepiece is a 1.25 inch (measure the hole in the focuser), then you can buy eyepieces and weights from several different retailers on-line:

http://www.agenaastro.com/

http://www.optcorp.com/

The screw you can find at a well stocked hardware store.

Aug 11, 2010 | Galileo FS-120DX Telescope

1 Answer

Got a( model:NG76AZ Focal Length:700mm


Put the eyepiece with the LARGEST number written on it into the telescope. DO NOT use the 2x barlow if you have one.

Try focusing on a distant object during the daytime.

Nov 04, 2009 | National Geographic 76AZ (525 x 76mm)...

2 Answers

No instuction manual


I have the instructions and Owner's manual for the NG76AZDCA;
do you still need this?

Sep 03, 2008 | National Geographic 76AZ (525 x 76mm)...

Not finding what you are looking for?
Optics Logo

Related Topics:

132 people viewed this question

Ask a Question

Usually answered in minutes!

Top National Geographic Optics Experts

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

Level 3 Expert

3186 Answers

Greg Cann
Greg Cann

Level 3 Expert

1114 Answers

Tom Chichester

Level 3 Expert

34124 Answers

Are you a National Geographic Optic Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...