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Missing lens that fits on the inside of eye piece. I have a F=9MM eyepice and am missing the part that fits inside. I think it is a screw in lens with a male fitting. Is it available and how much is it??

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No, you need to buy a new eyepiece. Here is a retailer:
http://www.agenaastro.com/


No one just sells "a piece" of an eyepiece.

Posted on Sep 06, 2010

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The eye piece lens is missing. How do i find the model number of the telescope to order a new eye piece and a manul for this telescope


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 "Edu-Science", 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.

There is an excellent website for beginner telescope users at THIS LINK

Jan 20, 2011 | Edu-Science (10166) Telescope

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

I have a Vivitar Telescope 60x/120x VIV-50600. Once I locate the object with the scope finder and I try to view it through the bigger lens nothing is focused. I have tried using the adjuster and nothing...


The only thing I can think to ask is whether you have fitted an eyepiece (NOT the barlow lens, if it came with one). Eyepieces are small lenses marked with a focal length (in mm, like 20mm or 9mm). They fit into the part that does the focussing, and are held by a small screw that you tighten with your fingers. If you have fitted an eyepiece and it still won't focus then I don't understand what is going on.

I would suggest that this is one of those problems best sorted by an experienced person physically present.

Dec 28, 2010 | Vivitar Optics

1 Answer

Missing lens


This is going to be very difficult to replace. However you can try contacting this company to see if they can order the part? Tasco does not sell replacement parts directly to the public.

http://agenaastro.com/

Jul 05, 2010 | Tasco Specialty 25x30 1AGST Brass Spyglass...

1 Answer

Missing a piece of my RX-9 +venture


You are missing the 2 inch to 1.25 inch adapter, that fits into the focuser so you can use 1.25 inch eyepieces.

Here:

http://www.agenaastro.com/Blue-Fireball-2-to-1-25-Eyepiece-Adapter-p/paar-bf-e04017.htm

May 19, 2010 | Bushnell 675x5 EQ Reflector Telescope

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 ?


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.

Feb 01, 2010 | National Geographic Optics

1 Answer

Missing parts to galaxsee tasco


eye pieces are interchangeable and you will want a few of them for different magnifications.
The previous owner probably got a new scope and kept them for that.
Here's where I go for lens' in Toronto Canada.

http://www.escience.ca/telescopes/RENDER/5/2022/1052/W1052.html

The rule of thumb is cheaper eyepieces are ok for the low magnification 35mm-20mm but as you get to higher magnification a better eyepiece will make more of a difference. How expensive is up to you and how serious you are into this. I think my better lens was a used tele-vue for $80

Jan 25, 2009 | Tasco Galaxsee 45-060675 Telescope

2 Answers

The main eye piece is missing the lens.


yes you can..most brands of telescopes will fit others as far as eyepieces go..so if you call bushnell@18004233537 im sure they can help...good luck....... lary@reichinstruments.com

Oct 31, 2008 | Tasco Astronomical 302675 Telescope

2 Answers

Telscope eye piece


Eyepieces are for the most part interchangeable. Your scope will have a focuser on it in one of 3 diameters. 2", 1.25", and the rare .965". Most inexpensive scope will use a 1.25" eyepiece. 2" focusers are usually found on more expensive scopes used for astrophotography due to the increased field of view with the larger diameter. Plossl eyepieces are fairly inexpensive and are good for all around use. I would suggest getting 2 one at 25mm or greater and one around 9mm. http://www.telescopes.com has a large selection however their are many suppliers out there. Good luck and happy star hopping

Jan 01, 2008 | Optics

3 Answers

Bushnell 18-1560 Telescope


Hello,
What you have is called a refractor-type telescope with the primary lenses (the Objective) at the top of the tube and the only other lenses in the system are your selection of eyepieces, probably a barlow lens (2X magnification of any eyepiece used), and a diagonal (in line mirror so that you cand see into the telescope from the side.). As the focal lenth of the eyepiece decreases, so does the distance away from the Objective Lens. I believe that you are using the telescope with a diagonal mirror which makes the optical path longer. The fact that your longer focal lenght eyepiece can focus and not your short one would be only if you didn't have the diagonal or the eyepiece all the way in tight to allow the focus mechanism (rack and pinioin) to get compressed enough to focus. Look at the Moon, if the image gets smaller then bigger as you focus, but not sharp, then I would have to tell you that your eyepeice lenses are not in the right order. Someoner may have taken it apart and didn.t put them back in the correct order. The lenese could just be very dirty also. Barrow a short focal lenght eyepice from a friend and see if it works in your system. Then you will know for sure.

May 15, 2007 | Bushnell Deep Space 18-1560 (150 x 53mm)...

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